GMC Vehicle Models Savana 1996-present Torque Specifications
GMC Vehicle Models Savana 1996-present

GMC Vehicle Models Savana 1996-present Torque Specifications

Complete GMC Vehicle Models Savana 1996-present torque specifications guide. Includes factory-specified torque values, torque sequences, and technical specifications for all components including body, brakes, drivetrain, electrical, emissions sensors, fuel, exhaust, HVAC, and suspension. Essential information for proper assembly and maintenance.

Updated

Important Information

Safety guidelines and reference information for proper torque application

Quick Reference Guide
ft-lbs → Nm
× 1.356
ft-lbs → kg-m
× 0.138
Nm → ft-lbs
× 0.738
in-lbs → ft-lbs
× 0.083

Common Torque Patterns

Star Pattern

Used for wheels and other circular bolt patterns

Star Pattern torque pattern diagram showing proper bolt tightening sequence
Cross Pattern

Used for gaskets and cover plates

Cross Pattern torque pattern diagram showing proper bolt tightening sequence
Sequential Pattern

Used for head bolts and other critical components

Sequential Pattern torque pattern diagram showing proper bolt tightening sequence

Common Mistakes to Avoid

Over-tightening

Exceeding the specified torque value can stretch or break fasteners, damage threads, or crack components.

Prevention:

Always use a calibrated torque wrench and follow specifications exactly.

Incorrect Torque Sequence

Tightening bolts in the wrong order can cause uneven pressure distribution and potential leaks or damage.

Prevention:

Follow the manufacturer's specified torque sequence pattern.

Dirty Threads

Dirt, rust, or old thread locker can affect torque readings and proper fastener tension.

Prevention:

Clean and inspect all threads before assembly. Use new thread locker if specified.

Reusing TTY Bolts

Torque-to-yield bolts are designed to stretch and must not be reused.

Prevention:

Always replace TTY bolts with new ones. They are single-use only.

Dry vs. Lubricated

Not accounting for whether torque specs are for dry or lubricated fasteners can lead to incorrect tension.

Prevention:

Check if specs are for dry or lubricated threads. Use specified lubricant when required.

Recommended Tools

Torque Wrench (1/4" Drive)

Range: 2-25 ft-lbs
Small fasteners, delicate components

Torque Wrench (3/8" Drive)

Range: 10-100 ft-lbs
Most common automotive fasteners

Torque Wrench (1/2" Drive)

Range: 30-250 ft-lbs
Large fasteners, wheels

Angle Gauge

Torque-to-yield (TTY) bolts

Torque Wrench Care

  • Calibrate annually or after 5,000 clicks
  • Store at lowest setting
  • Keep clean and lubricated

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Search by component name, bolt size, or description

Torque Calculator

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4.3l Engine

Torque specifications for 4.3L Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.5
Torque Specification
1. 22 ft-lbs (30 N·m) 2. 90°
Important Notes
Follow the manufacturer's torque sequence for proper sealing.

Crankshaft And Bearings

1

Main Bearing Bolts

M12 x 1.75
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Ensure proper alignment of the main bearing caps before tightening.
2

Crankshaft Pulley/Harmonic Balancer Bolt

M16 x 2.0
Torque Specification
74 ft-lbs (100 N·m)
Important Notes
Ensure the crankshaft is properly secured before tightening.

Connecting Rods

1

Connecting Rod Nuts

M10 x 1.25
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Ensure proper alignment of the connecting rod caps before tightening.

Flywheel

1

Flywheel Bolts

M12 x 1.75
Torque Specification
75 ft-lbs (102 N·m)
Important Notes
Ensure the flywheel is properly aligned before tightening.

Oil System

1

Oil Pan Bolts

M8 x 1.25
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Ensure the oil pan gasket is properly seated before tightening.
2

Oil Pump Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Estimated value based on similar bolt sizes.

Valvetrain

1

Rocker Arms/Shafts Bolts

M8 x 1.25
Torque Specification
19 ft-lbs (26 N·m)
Important Notes
Ensure proper alignment of the rocker arms before tightening.
2

Valve Cover Bolts

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Ensure the valve cover gasket is properly seated before tightening.

Intake And Exhaust

1

Intake Manifold Bolts

M8 x 1.25
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure the intake manifold gasket is properly seated before tightening.
2

Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure the exhaust manifold gasket is properly seated before tightening.

Cooling System

1

Water Pump Bolts

M8 x 1.25
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Ensure the water pump gasket is properly seated before tightening.
2

Thermostat Housing Bolts

M6 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the thermostat housing gasket is properly seated before tightening.

Accessories

1

Starter Motor Mounting Bolts

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure the starter motor is properly aligned before tightening.
2

Alternator Mounting Bolts

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure the alternator is properly aligned before tightening.
3

Power Steering Pump Mounting Bolts

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure the power steering pump is properly aligned before tightening.

4l60 Transmission

Torque specifications for 4l60 Transmission

Transmission Mounting

1

Transmission Mounting Bolts

M10 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Ensure the transmission is properly aligned before tightening.

Oil Pan

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Use a new gasket and ensure the pan surface is clean and free of debris.

Fluid Ports

1

Transmission Drain and Fill Plugs

M12 x 1.75
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure the threads are clean and free of debris before installation.

Drive Axle

1

Drive Axle/Half Shaft Bolts

M12 x 1.5
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
Ensure the splines are properly aligned before tightening.

Propeller Shaft

1

Propeller/Drive Shaft Bolts

M8 x 1.25
Torque Specification
14 ft-lbs (19 N·m)
Important Notes
Ensure the drive shaft is properly aligned before tightening.

Torque Converter

1

Torque Converter Bolts

M8 x 1.25
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Estimated value based on typical torque converter bolt specifications. Ensure the torque converter is properly seated before tightening.

Bellhousing

1

Transmission Bellhousing Bolts

M10 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Ensure the bellhousing is properly aligned with the engine block before tightening.

Valve Body

1

Transmission Valve Body Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (13.5 N·m)
Important Notes
Ensure the valve body is properly seated before tightening.

Shift Linkage

1

Transmission Shift Linkage Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the shift linkage is properly aligned before tightening.

Cooler Lines

1

Transmission Cooler Line Fittings

M12 x 1.5
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure the fittings are properly aligned and the threads are clean before tightening.

5.3l Engine

Torque specifications for 5.3L Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.5
Torque Specification
1. 22 ft-lbs (30 N·m) 2. 90°
Important Notes
Follow the specified torque sequence to ensure proper sealing and prevent warping.
2

Valve Cover Bolts

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Ensure the valve cover gasket is properly seated before tightening.

Crankshaft And Bearings

1

Main Bearing Bolts

M11 x 1.5
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Follow the specified torque sequence to ensure proper alignment of the crankshaft.
2

Connecting Rod Nuts

M9 x 1.25
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Ensure the connecting rod bearings are properly installed before tightening.

Timing System

1

Timing Chain Tensioner Bolt

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure the tensioner is properly seated before tightening.
2

Camshaft Sprocket Bolt

M10 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure the camshaft sprocket is properly aligned before tightening.

Intake And Exhaust

1

Intake Manifold Bolts

M8 x 1.25
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Follow the specified torque sequence to ensure proper sealing.
2

Exhaust Manifold Bolts

M8 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Follow the specified torque sequence to prevent warping.

Accessories

1

Starter Motor Mounting Bolts

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure the starter motor is properly aligned before tightening.
2

Alternator Mounting Bolts

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure the alternator is properly aligned before tightening.

6.6l Engine

Torque specifications for 6.6L Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.5
Torque Specification
1. 22 ft-lbs (30 N·m) 2. 90°
Important Notes
Follow the manufacturer's specified torque sequence for proper sealing.

Crankshaft And Bearings

1

Main Bearing Bolts

M12 x 1.75
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Ensure proper alignment of the crankshaft before tightening.
2

Connecting Rod Nuts

M10 x 1.25
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Ensure proper alignment of the connecting rods before tightening.

Flywheel

1

Flywheel Bolts

M12 x 1.75
Torque Specification
75 ft-lbs (102 N·m)
Important Notes
Ensure the flywheel is properly aligned before tightening.

Oil System

1

Oil Pan Bolts

M8 x 1.25
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Ensure the oil pan gasket is properly seated before tightening.
2

Oil Drain Plug

M14 x 1.5
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure the drain plug washer is in good condition before tightening.

Valvetrain

1

Valve Cover Bolts

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Ensure the valve cover gasket is properly seated before tightening.
2

Rocker Arm Bolts

M8 x 1.25
Torque Specification
19 ft-lbs (26 N·m)
Important Notes
Ensure proper valve adjustment before tightening.

Timing System

1

Timing Belt/Chain Tensioner Bolt

M10 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure proper tension on the timing belt/chain before tightening.
2

Camshaft Sprocket Bolt

M12 x 1.75
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure proper alignment of the camshaft sprocket before tightening.

Intake And Exhaust

1

Intake Manifold Bolts

M8 x 1.25
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure the intake manifold gasket is properly seated before tightening.
2

Exhaust Manifold Bolts

M8 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure the exhaust manifold gasket is properly seated before tightening.

Cooling System

1

Water Pump Bolts

M8 x 1.25
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Ensure the water pump gasket is properly seated before tightening.
2

Thermostat Housing Bolts

M6 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the thermostat housing gasket is properly seated before tightening.

Accessories

1

Starter Motor Mounting Bolts

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure proper alignment of the starter motor before tightening.
2

Alternator Mounting Bolts

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure proper alignment of the alternator before tightening.
3

Serpentine Belt Tensioner Bolt

M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure proper tension on the serpentine belt before tightening.

Fuel System

1

Fuel Injector Bolts

M6 x 1.0
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Ensure proper seating of the fuel injectors before tightening.
2

Fuel Rail Bolts

M6 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure proper alignment of the fuel rail before tightening.
3

Throttle Body Bolts

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Ensure proper alignment of the throttle body before tightening.

Ignition System

1

Spark Plugs

M14 x 1.25
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Ensure proper seating of the spark plugs before tightening.
2

Ignition Coil Bolt

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure proper alignment of the ignition coil before tightening.

Turbocharger

1

Turbocharger Mounting Bolts

M10 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Estimated value based on similar turbocharger applications.

Sensors

1

Crankshaft Position Sensor Bolt

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure proper alignment of the sensor before tightening.
2

Camshaft Position Sensor Bolt

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure proper alignment of the sensor before tightening.

6l80 Transmission

Torque specifications for 6l80 Transmission

Transmission Mounting

1

Transmission Mounting Bolts

M10 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Ensure bolts are tightened in a crisscross pattern to evenly distribute load.

Oil Pan

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Ensure the oil pan gasket is properly seated before tightening.

Fluid Plugs

1

Transmission Drain and Fill Plugs

M12 x 1.75
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure the sealing washer is in good condition or replace it.

Driveline

1

Drive Axle/Half Shaft Bolts

M12 x 1.5
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
Ensure the axle is properly seated before tightening.
2

CV Joint/Axle Nut

M24 x 1.5
Torque Specification
185 ft-lbs (251 N·m)
Important Notes
Ensure the axle is fully seated before tightening.
3

Propeller/Drive Shaft Bolts

M8 x 1.25
Torque Specification
14 ft-lbs (19 N·m)
Important Notes
Ensure the drive shaft is properly aligned before tightening.

Torque Converter

1

Torque Converter Bolts

M10 x 1.25
Torque Specification
46 ft-lbs (62 N·m)
Important Notes
Ensure the torque converter is fully seated before tightening.

Bellhousing

1

Transmission Bellhousing Bolts

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure the bellhousing is properly aligned with the engine block.

Valve Body

1

Transmission Valve Body Bolts

M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Ensure the valve body is properly seated before tightening.

Cooler Lines

1

Transmission Cooler Line Fittings

M12 x 1.5
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure the fittings are properly aligned before tightening.

Shift Linkage

1

Transmission Shift Linkage Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure the shift linkage is properly aligned before tightening.

Output Shaft Seal

1

Transmission Output Shaft Seal Retainer Bolts

M6 x 1.0
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure the seal is properly seated before tightening.

Body

Torque specifications for Body

Body Panels

1

Fender Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Estimated value based on typical M8 bolts used in body panels.
2

Hood Hinge Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated value based on typical M8 bolts used in hood hinges.

Bumpers

1

Front Bumper Mounting Bolts

M10 x 1.5
Torque Specification
28 ft-lbs (38 N·m)
Important Notes
Estimated value based on typical M10 bolts used in bumper mounting.
2

Rear Bumper Mounting Bolts

M10 x 1.5
Torque Specification
28 ft-lbs (38 N·m)
Important Notes
Estimated value based on typical M10 bolts used in bumper mounting.

Seats

1

Front Seat Mounting Bolts

M12 x 1.75
Torque Specification
38 ft-lbs (52 N·m)
Important Notes
Estimated value based on typical M12 bolts used in seat mounting.

Doors

1

Door Hinge Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated value based on typical M8 bolts used in door hinges.

Roof Rack

1

Roof Rack Mounting Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Estimated value based on typical M8 bolts used in roof rack mounting.

Tailgate

1

Tailgate Hinge Bolts

M8 x 1.25
Torque Specification
24 ft-lbs (33 N·m)
Important Notes
Estimated value based on typical M8 bolts used in tailgate hinges.

Mirrors

1

Mirror Mounting Bolts

M6 x 1.0
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value based on typical M6 bolts used in mirror mounting.

Grille

1

Grille Mounting Bolts

M6 x 1.0
Torque Specification
14 ft-lbs (19 N·m)
Important Notes
Estimated value based on typical M6 bolts used in grille mounting.

Brakes

Torque specifications for Brakes

Brake Caliper System

1

Brake Caliper Bolts

M10 x 1.5
Torque Specification
38 ft-lbs (51 N·m)
Important Notes
These bolts secure the brake caliper to the mounting bracket. Proper torque ensures the caliper remains securely attached.
2

Brake Caliper Mounting Bracket Bolts

M14 x 1.5
Torque Specification
133 ft-lbs (180 N·m)
Important Notes
These bolts attach the caliper mounting bracket to the steering knuckle or axle. Correct torque is critical to maintain structural integrity.

Brake Rotor Drum System

1

Brake Disc/Drum Retaining Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
These bolts secure the brake rotor or drum to the hub. Proper torque ensures the rotor/drum remains stable.

Wheel Hub System

1

Wheel Lug Nuts

M12 x 1.5
Torque Specification
100 ft-lbs (135 N·m)
Important Notes
These lug nuts secure the wheel to the hub, which is critical for proper brake rotor alignment.

Brake Hydraulic System

1

Brake Hose Banjo Bolt

M6 x 1.0
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
This bolt connects the brake hose to the caliper or wheel cylinder. Proper torque ensures a leak-free seal.
2

Brake Master Cylinder Mounting Bolts

M6 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
These bolts secure the master cylinder to the brake booster. Proper torque ensures the master cylinder remains firmly attached.
3

Brake Booster Mounting Bolts

M6 x 1.0
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
These bolts attach the brake booster to the firewall. Correct torque ensures the booster remains securely mounted.
4

Brake Line Fittings

M5 x 0.8
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
These fittings connect brake lines to various components. Proper torque prevents leaks and ensures hydraulic pressure is maintained.

Parking Brake System

1

Parking Brake Cable Bracket Bolts

M6 x 1.0
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
These bolts secure the parking brake cable bracket to the chassis or axle. Proper torque ensures the parking brake system functions correctly.

Drivetrain

Torque specifications for Drivetrain

Transmission

1

Transmission Mounting Bolts

M10 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Ensure proper alignment of the transmission during installation.
2

Transmission Oil Pan Bolts

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Over-tightening can damage the oil pan gasket.
3

Transmission Drain and Fill Plugs

M12 x 1.75
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure the sealing washer is in good condition before installation.

Drive Axle

1

Drive Axle/Half Shaft Bolts

M12 x 1.5
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
Ensure proper alignment of the axle during installation.
2

CV Joint/Axle Nut

M24 x 1.5
Torque Specification
185 ft-lbs (251 N·m)
Important Notes
Use a torque wrench capable of handling high torque values.

Drive Shaft

1

Propeller/Drive Shaft Bolts

M8 x 1.25
Torque Specification
14 ft-lbs (19 N·m)
Important Notes
Ensure proper alignment of the drive shaft during installation.
2

Drive Shaft Coupling Bolts

M10 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated value based on similar components.

Differential

1

Differential Mounting Bolts

M12 x 1.75
Torque Specification
75 ft-lbs (102 N·m)
Important Notes
Estimated value based on similar components.
2

Differential Drain/Fill Plug

M14 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure the sealing washer is in good condition before installation.
3

Differential Cover Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Over-tightening can damage the differential cover gasket.

Transfer Case

1

Transfer Case Mounting Bolts

M12 x 1.75
Torque Specification
75 ft-lbs (102 N·m)
Important Notes
Estimated value based on similar components.
2

Transfer Case Drain/Fill Plug

M14 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure the sealing washer is in good condition before installation.

Wheel Hub

1

Wheel Hub Bolts

M14 x 1.5
Torque Specification
100 ft-lbs (135 N·m)
Important Notes
Estimated value based on similar components.

Electrical

Torque specifications for Electrical

Ignition System

1

Ignition Coil Bolt

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure the ignition coil is properly seated before applying torque.

Battery System

1

Battery Terminal Nuts

M6 x 1.0
Torque Specification
5.92 ft-lbs (8 N·m)
Important Notes
Ensure the battery terminals are clean and free of corrosion before tightening.

Starting System

1

Starter Motor Mounting Bolts

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure the starter motor is properly aligned before applying torque.

Charging System

1

Alternator Mounting Bolts

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure the alternator is properly aligned before applying torque.

Grounding System

1

Grounding Bolt (Electrical System Ground)

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Estimated value based on similar grounding bolts.

Fuse Box

1

Fuse Box Mounting Bolts

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Estimated value based on similar mounting bolts.

Wiring Harness

1

Wiring Harness Clamp Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value based on similar clamp bolts.

Emissions Sensors

Torque specifications for Emissions_sensors

Egr System

1

EGR Valve Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the EGR valve is properly aligned before tightening.

Exhaust Manifold

1

Exhaust Manifold/Headers Bolts

M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Use a crisscross pattern to ensure even clamping force.
2

Exhaust Manifold/Headers to Cylinder Head Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the manifold is properly seated before tightening.

Exhaust Pipe

1

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure the gasket is properly seated before tightening.
2

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the gasket is properly seated before tightening.

Emissions Sensors

1

O2 Sensor Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure the sensor is properly aligned before tightening.
2

Exhaust Temperature Sensor Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the sensor is properly aligned before tightening.
3

Catalytic Converter Sensor Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the sensor is properly aligned before tightening.

Fuel System

1

Fuel Injector Bolts

M6 x 1.0
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Ensure the injector is properly seated before tightening.

Exhaust

Torque specifications for Exhaust

Exhaust Manifold Headers

1

Exhaust Manifold/Headers to Cylinder Head Bolts

M10 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure proper torque sequence to avoid warping the manifold or headers.
2

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M10 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure the exhaust pipe is properly aligned before tightening.

Catalytic Converter

1

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the catalytic converter is properly aligned before tightening.

Muffler

1

Muffler to Exhaust Pipe Bolts

M10 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the muffler is properly aligned before tightening.

Exhaust Hangers

1

Exhaust Hanger Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure the exhaust system is properly aligned before tightening.

Oxygen Sensor

1

Oxygen Sensor (O2 Sensor) Bolts

M12 x 1.25
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure the oxygen sensor is properly aligned before tightening.

Exhaust Flanges

1

Exhaust Flange Bolts

M10 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure the exhaust sections are properly aligned before tightening.

Heat Shields

1

Heat Shield Bolts

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Ensure the heat shield is properly aligned before tightening.

Fuel

Torque specifications for Fuel

Fuel Rail System

1

Fuel Rail Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure bolts are tightened in a crisscross pattern to evenly distribute pressure.
2

Fuel Injector Bolts

M6 x 1.0
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Ensure injectors are properly seated before tightening.
3

Fuel Injector Rail Bolts

M6 x 1.0
Torque Specification
7.3 ft-lbs (10 N·m)
Important Notes
Ensure the rail is properly aligned before tightening.

Fuel Delivery System

1

Fuel Pump Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure the pump is properly seated before tightening.
2

Fuel Line Fittings

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure fittings are properly aligned and seated before tightening.

Fuel Tank System

1

Fuel Tank Strap Bolts

M10 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Ensure the tank is properly aligned before tightening.
2

Fuel Filler Neck Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the filler neck is properly aligned before tightening.
3

Fuel Tank Sender Unit Bolts

M6 x 1.0
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure the sender unit is properly seated before tightening.

Fuel Filter System

1

Fuel Filter Bolt/Nut

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the filter is properly aligned before tightening.

Fuel Pressure Regulation

1

Fuel Pressure Regulator Bolts

M6 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the regulator is properly seated before tightening.

Fuel Cap

1

Fuel Cap

M48 x 1.5
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Hand-tighten until snug, then torque to 11 ft-lbs (15 Nm).

Hvac

Torque specifications for Hvac

Compressor Subsystem

1

A/C Compressor Mounting Bolts

M10 x 1.25
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure the compressor is aligned properly before tightening. Use a crisscross pattern for the torque sequence.
2

A/C Line Fittings

M12 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Estimated value based on typical A/C line fitting torque specifications. Ensure fittings are clean and free of debris before tightening.

Evaporator Subsystem

1

Evaporator Housing Bolts

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Ensure the housing is properly sealed to prevent air leaks. Use a crisscross pattern for the torque sequence.

Blower Motor Subsystem

1

Blower Motor Mounting Bolts

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Ensure the blower motor is securely mounted to prevent vibrations.

Heater Core Subsystem

1

Heater Core Inlet/Outlet Fittings

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the fittings are clean and free of debris before tightening.

Control Panel Subsystem

1

HVAC Control Panel Mounting Bolts

M5 x 0.8
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Ensure the control panel is securely mounted to prevent misalignment or damage to the control mechanisms.

Condenser Subsystem

1

Condenser Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure the condenser is aligned properly before tightening. Use a crisscross pattern for the torque sequence.

Suspension

Torque specifications for Suspension

Strut Shock Absorber

1

Strut/Shock Absorber Upper Mounting Bolts

M12 x 1.5
Torque Specification
75 ft-lbs (102 N·m)
Important Notes
Ensure proper alignment before tightening.
2

Shock Absorber Lower Mounting Bolts

M10 x 1.25
Torque Specification
50 ft-lbs (68 N·m)
Important Notes
Estimated value based on similar components.

Control Arms

1

Control Arm Bolts

M12 x 1.75
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Ensure proper alignment before tightening.
2

Ball Joint Nut

M10 x 1.25
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Ensure the ball joint is seated properly before tightening.

Steering Components

1

Tie Rod End Nut

M8 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Ensure the tie rod end is properly seated before tightening.
2

Steering Gear/Rack Bolts

M14 x 1.5
Torque Specification
90 ft-lbs (122 N·m)
Important Notes
Ensure proper alignment before tightening.

Sway Bar

1

Sway Bar Link Nut

M8 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Ensure the sway bar link is properly seated before tightening.
2

Sway Bar Bracket Bolts

M8 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Ensure the sway bar brackets are properly aligned before tightening.
3

Track Bar/Stabilizer Bar Bolts

M12 x 1.75
Torque Specification
75 ft-lbs (102 N·m)
Important Notes
Ensure proper alignment before tightening.

Subframe

1

Subframe Mounting Bolts

M14 x 1.5
Torque Specification
90 ft-lbs (122 N·m)
Important Notes
Ensure proper alignment before tightening.

Wheels

1

Wheel Lug Nuts

M12 x 1.5
Torque Specification
100 ft-lbs (135 N·m)
Important Notes
Use a star pattern for tightening to ensure even pressure.

Troubleshooting Guide

Common issues, diagnostic steps, and prevention guidelines

Common Issues

Bolt stretching, stripped threads, uneven torque patterns

Loose Components

Symptoms:
  • Rattling or vibration noises
  • Visible movement in components
  • Uneven panel gaps
Solutions:
  • Clean threads and mounting surfaces
  • Replace damaged fasteners
  • Apply proper torque in sequence
  • Use thread locker if specified

Stripped Fasteners

Symptoms:
  • Unable to achieve proper torque
  • Fastener spins freely
  • Visible thread damage
Solutions:
  • Use thread repair kit if appropriate
  • Install thread insert (HeliCoil)
  • Replace component if threaded hole is damaged
  • Upgrade to higher grade fastener if recommended

Overtightened Components

Symptoms:
  • Cracked or deformed parts
  • Broken fasteners
  • Compressed gaskets or seals
Solutions:
  • Replace damaged components
  • Use new fasteners
  • Follow proper torque sequence
  • Verify correct torque specifications

Diagnostic Steps

Visual inspection, torque verification, thread assessment

1

Visual Inspection

Inspect the affected area for any visible signs of damage or wear

  • Check for cracks or deformation
  • Look for signs of excessive wear
  • Verify proper fastener installation
2

Torque Verification

Verify the torque applied to the fasteners

  • Check the torque wrench calibration
  • Verify the torque specification
  • Compare the applied torque to the specification
3

Thread Assessment

Assess the condition of the threads

  • Check for signs of thread damage
  • Verify the thread type and size
  • Check for proper thread engagement

Prevention Guidelines

Best practices, maintenance tips, tool care

Best Practices

  • Always follow the recommended torque specification
  • Use the correct type and size of fasteners
  • Verify the torque wrench calibration regularly

Maintenance Tips

  • Regularly inspect the affected area for signs of wear or damage
  • Replace damaged or worn-out components promptly
  • Keep the work area clean and organized

Tool Care

  • Regularly clean and maintain the torque wrench
  • Store the torque wrench in a dry and secure location
  • Verify the torque wrench calibration before each use

Frequently Asked Questions

Find answers to common questions about torque specifications

Q1

What torque wrench should I use for my GMC Savana?

Use a torque wrench with a range that covers the torque specifications for the bolts you need to tighten. The most commonly used torque wrench range for automotive applications IS 20-200 ft-lbs (27-271 Nm).

Q2

How do I ensure accurate torque application?

To ensure accurate torque application, follow these steps: - Calibrate your torque wrench regularly as per the manufacturer's instructions. - Clean the threads of the bolt and apply a light coat of oil to reduce friction. - Position the torque wrench perpendicular to the bolt. - Apply slow, steady pressure until the wrench clicks or reaches the desired torque.

Q3

What IS the difference between dry and lubricated torque specifications?

Dry torque specifications are used when the threads of a bolt are not lubricated. Lubricated torque specifications are used when the threads are lightly lubricated with oil or grease to reduce friction. Dry torque specifications are typically 10-20% higher than lubricated torque specifications.

Q4

Can I use a thread sealant on bolts?

Yes, thread sealant can be used on bolts to improve sealing and prevent leaks. However, thread sealant should not be used as a substitute for proper torque application.

Q5

What IS the purpose of using a torque sequence when tightening bolts?

Using a torque sequence when tightening bolts ensures that the load IS evenly distributed across the joint. This helps prevent distortion of the parts and ensures proper sealing. GMC recommends following the torque sequence specified in the service manual.

Q6

How do I know if a bolt IS over-torqued?

Signs of over-torquing a bolt can include: - Stripped or damaged threads. - Bolt head distortion. - Bolt fracture. If you suspect a bolt has been over-torqued, it should be replaced.

Environmental Considerations

Temperature, humidity, and seasonal effects on torque specifications

Temperature Effects

Includes: High Heat, Cold Weather, Thermal Cycling

Temperature can significantly impact torque values and fastener behavior

Cold Weather

Effects:
  • Increased material brittleness
  • Higher torque required due to thread contraction
  • Reduced thread lubricant effectiveness
Recommendations:
  • Allow components to warm to room temperature when possible
  • Consider using winter-grade thread lubricants
  • Check torque values more frequently during winter months

Hot Weather

Effects:
  • Thermal expansion of components
  • Decreased friction in threads
  • Accelerated lubricant breakdown
Recommendations:
  • Check torque when components are at normal operating temperature
  • Use temperature-resistant thread lockers
  • Consider re-torquing after heat cycles

Humidity and Corrosion

Covers: Rust Prevention, Salt Exposure, Moisture Control

Moisture and corrosion can affect fastener integrity and torque values

High Humidity

Effects:
  • Accelerated corrosion formation
  • Reduced friction coefficient
  • Potential thread seizing
Prevention:
  • Use corrosion-resistant fasteners
  • Apply appropriate anti-seize compounds
  • Maintain proper protective coatings

Salt Exposure

Effects:
  • Rapid corrosion development
  • Thread damage
  • Seized fasteners
Prevention:
  • Regular underbody washing
  • Use of sacrificial anodes where appropriate
  • Application of protective coatings

Seasonal Maintenance

Spring, Summer, Fall, and Winter maintenance schedules

Spring

  • Inspect for winter damage
  • Clean and protect exposed fasteners
  • Check torque on critical components

Summer

  • Monitor heat-affected components
  • Check expansion-related loosening
  • Inspect cooling system mounts

Fall

  • Prepare for winter conditions
  • Apply corrosion protection
  • Verify all fasteners are properly torqued

Winter

  • More frequent inspection of critical fasteners
  • Check for salt damage
  • Monitor suspension component torque

Related Resources

Tools, service procedures, and technical bulletins

Recommended Tools

Digital Torque Wrench (10-100 Nm)

Recommended for accurate and precise tightening of fasteners as per torque specifications, ensuring optimal performance and preventing damage to components.

  • Digital display for clear and accurate readings
  • Audible and visual indicators to alert when the desired torque IS achieved
  • Reversible ratcheting mechanism for easy maneuverability
  • Range of torque settings to accommodate various applications on the GMC Savana
Learn more
Service Procedures

Engine Component Bolt Tightening Procedure

Step-by-step guide for proper tightening of engine component bolts, ensuring correct torque values for optimal engine performance and longevity.

  • Clean and inspect bolts and threads for any damage or corrosion.
  • Apply a thin layer of threadlocker or anti-seize compound to the threads as per the manufacturer's recommendations.
  • Tighten the bolts to the specified torque values using a calibrated torque wrench.
  • Follow the tightening sequence provided in the service manual to ensure even distribution of clamping force.
  • Recheck the torque of the bolts after a specified period of time to ensure they remain within the recommended range.
View full procedure

Suspension and Steering Component Bolt Tightening Procedure

Detailed instructions for tightening suspension and steering components to the correct torque specifications, ensuring optimal handling, stability, and safety.

  • Lift the vehicle and support it securely using jack stands.
  • Clean and inspect all bolts, nuts, and washers for any wear or damage.
  • Apply an anti-seize compound to the threads of the bolts and nuts to prevent corrosion and ensure smooth tightening.
  • Tighten the bolts and nuts to the torque values specified in the service manual using a calibrated torque wrench.
  • Follow the recommended tightening sequence to ensure proper load distribution and component alignment.
View full procedure
Technical Service Bulletins

Technical Service Bulletin: Revised Torque Specifications for Intake Manifold Bolts

2023-03-15

This bulletin provides updated torque specifications for the intake manifold bolts on certain model years of the GMC Savana. Failure to adhere to these updated specifications can result in insufficient clamping force and potential intake manifold leaks.

1996-2002 GMC Savana

Resolution: The bulletin outlines the revised torque values for the intake manifold bolts and provides clear instructions for proper tightening procedures. Technicians are advised to refer to this bulletin for the most up-to-date torque specifications when servicing the intake manifold on affected vehicles.

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Technical Information
  • All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
  • Vehicle specifications and procedures may vary by model year, trim level, and region.
  • Always follow the manufacturer's recommended procedures and safety precautions.
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About the Author

Expert automotive knowledge and experience

Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

ASE Master Certified Technician with over a decade of hands-on experience in automotive repair and diagnostics.

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