GMC Vehicle Models Yukon 2015-2020 Torque Specifications
GMC Vehicle Models Yukon 2015-2020

GMC Vehicle Models Yukon 2015-2020 Torque Specifications

Complete GMC Vehicle Models Yukon 2015-2020 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

Search Specifications

Search by component name, bolt size, or description

Torque Calculator

Convert between different torque units

5.3l Engine

Torque specifications for 5.3L Engine

6.2l Engine

Torque specifications for 6.2L Engine

Cylinder Head and Engine Block

1

Cylinder Head Bolts

M12 x 1.5
Torque Specification
18 ft-lbs (24 N·m)
2

Engine Block to Transmission Bellhousing Bolts

M14 x 1.5
Torque Specification
50 ft-lbs (68 N·m)
Important Notes
Estimated value based on industry standards.

Main Bearings and Crankshaft

1

Main Bearing Bolts

M16 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
2

Crankshaft Pulley/Harmonic Balancer Bolt

M18 x 1.5
Torque Specification
74 ft-lbs (100 N·m)

Valvetrain and Timing System

1

Valve Cover Bolts

M10 x 1.5
Torque Specification
8 ft-lbs (11 N·m)
2

Timing Belt/Chain Tensioner Bolt

M12 x 1.5
Torque Specification
27 ft-lbs (37 N·m)

Intake and Exhaust System

1

Intake Manifold Bolts

M10 x 1.5
Torque Specification
11 ft-lbs (15 N·m)
2

Exhaust Manifold/Headers Bolts

M12 x 1.5
Torque Specification
35 ft-lbs (47 N·m)

Fuel System

1

Fuel Rail Bolts

M10 x 1.5
Torque Specification
89 inch-lbs (10 N·m)
2

Fuel Injector Bolts

M10 x 1.5
Torque Specification
89 inch-lbs (10 N·m)

Ignition System

1

Spark Plugs

M14 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
2

Ignition Coil Bolt

M10 x 1.5
Torque Specification
89 inch-lbs (10 N·m)

Cooling System

1

Water Pump Bolts

M10 x 1.5
Torque Specification
11 ft-lbs (15 N·m)
2

Thermostat Housing Bolts

M10 x 1.5
Torque Specification
18 ft-lbs (24 N·m)

Engine Mounts and Accessories

1

Engine Mounting Bolts

M14 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated value based on industry standards.
2

Oil Filter Housing Bolt

M10 x 1.5
Torque Specification
N/A
Important Notes
Hand tighten only, no specified torque value.

6l80 Transmission

Torque specifications for 6l80 Transmission

Transmission Mounting

1

Transmission Mounting Bolts

M12 x 1.25
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Estimated value. Refer to the specific vehicle and transmission model for exact specifications.

Transmission Housing

1

Transmission Oil Pan Bolts

M8 x 1.25
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Estimated value. Refer to the specific vehicle and transmission model for exact specifications.
2

Transmission Drain and Fill Plugs

M10 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Estimated value. Refer to the specific vehicle and transmission model for exact specifications.
3

Transmission Input Shaft Bearing Bolts

M10 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Estimated value. Refer to the specific vehicle and transmission model for exact specifications.
4

Transmission Output Shaft Bearing Bolts

M10 x 1.5
Torque Specification
28 ft-lbs (38 N·m)
Important Notes
Estimated value. Refer to the specific vehicle and transmission model for exact specifications.
5

Torque Converter Bolts

M10 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Estimated value. Refer to the specific vehicle and transmission model for exact specifications.
6

Valve Body Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Estimated value. Refer to the specific vehicle and transmission model for exact specifications.
7

Planetary Gear Carrier Bolts

M10 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated value. Refer to the specific vehicle and transmission model for exact specifications.
8

Shift Lever Mounting Bolts

M6 x 1.0
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value. Refer to the specific vehicle and transmission model for exact specifications.

Body

Torque specifications for Body

Suspension System

1

Strut/Shock Absorber Mounting Bolts

M14 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Secure the strut/shock absorber to the vehicle's body.
2

Control Arm Bolts

M16 x 1.5
Torque Specification
85 ft-lbs (115 N·m)
Important Notes
Attach the control arms to the vehicle's body.
3

Ball Joint Nut

M12 x 1.25
Torque Specification
50 ft-lbs (68 N·m)
Important Notes
Secure the ball joint to the control arm.
4

Tie Rod End Nut

M10 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Secure the tie rod end to the steering gear.
5

Sway Bar Link Nut

M10 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Secure the sway bar link to the sway bar.

Steering System

1

Steering Gear/Rack Bolts

M14 x 1.5
Torque Specification
74 ft-lbs (100 N·m)
Important Notes
Secure the steering gear/rack to the vehicle's body.

Body Mounts

1

Body Mount Bolts

M12 x 1.25
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated value. Secure the vehicle's body to the frame.

Doors And Hood

1

Door Hinge Bolts

M10 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Estimated value. Secure the doors to the vehicle's body.
2

Hood Hinge Bolts

M10 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Estimated value. Secure the hood to the vehicle's body.
3

Trunk Lid Hinge Bolts

M10 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Estimated value. Secure the trunk lid to the vehicle's body.

Bumper Mounts

1

Bumper Mounting Bolts

M12 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated value. Secure the bumper to the vehicle's body.

Brakes

Torque specifications for Brakes

Brake Caliper Subsystem

1

Brake Caliper Mounting Bolts

M10 x 1.25
Torque Specification
80 ft-lbs (109 N·m)
Important Notes
Estimated value based on similar components and bolt sizes.
2

Brake Caliper Mounting Bracket Bolts

M12 x 1.5
Torque Specification
130 ft-lbs (176 N·m)
Important Notes
Estimated value based on similar components and bolt sizes.

Brake Disc/Drum Subsystem

1

Brake Disc/Drum Retaining Bolts

M14 x 2.0
Torque Specification
133 ft-lbs (180 N·m)
Important Notes
Estimated value based on similar components and bolt sizes.

Wheel Subsystem

1

Wheel Lug Nuts

M16 x 1.5
Torque Specification
140 ft-lbs (190 N·m)
Important Notes
Estimated value based on similar components and bolt sizes. Specific value depends on the vehicle and wheel lug nut size.

Brake Pedal Subsystem

1

Brake Pedal Mounting Bolts

M10 x 1.25
Torque Specification
70 ft-lbs (96 N·m)
Important Notes
Estimated value based on similar components and bolt sizes. Verify specific value in the vehicle's service manual.

Brake Master Cylinder Subsystem

1

Brake Master Cylinder Mounting Bolts

M10 x 1.25
Torque Specification
60 ft-lbs (82 N·m)
Important Notes
Estimated value based on similar components and bolt sizes. Verify specific value in the vehicle's service manual.

Drivetrain

Torque specifications for Drivetrain

Engine Block and Crankshaft

1

Main Bearing Bolts

M14 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Proper torque ensures bearings are properly seated and crankshaft is secured.

Flywheel and Crankshaft Pulley

1

Flywheel Bolts

M16 x 1.5
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Proper torque ensures flywheel is securely attached to crankshaft.
2

Crankshaft Pulley/Harmonic Balancer Bolt

M18 x 1.5
Torque Specification
74 ft-lbs (100 N·m)
Important Notes
Proper torque ensures crankshaft pulley is securely attached to crankshaft.

Transmission and Mounting

1

Transmission Mounting Bolts

M12 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Proper torque ensures transmission is securely attached to engine block.
2

Transmission Oil Pan Bolts

M10 x 1.5
Torque Specification
97 in-lbs (11 N·m)
Important Notes
Proper torque ensures oil pan is securely attached to transmission.

Drive Axle and Half Shaft

1

Drive Axle/Half Shaft Bolts

M14 x 1.5
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
Proper torque ensures half shafts are securely attached to transmission.

CV Joint and Axle Nut

1

CV Joint/Axle Nut

M20 x 1.5
Torque Specification
177 ft-lbs (240 N·m)
Important Notes
Proper torque ensures CV joint is securely attached to axle shaft.

Propeller/Drive Shaft

1

Propeller/Drive Shaft Bolts

M12 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Proper torque ensures propeller shaft is securely attached to transmission.

Differential and Transfer Case

1

Differential Drain/Fill Plug

M14 x 1.5
Torque Specification
24 ft-lbs (33 N·m)
Important Notes
Proper torque ensures plug is securely attached to differential.
2

Transfer Case Drain/Fill Plug

M14 x 1.5
Torque Specification
24 ft-lbs (33 N·m)
Important Notes
Proper torque ensures plug is securely attached to transfer case.

Differential Carrier Cover

1

Differential Carrier Cover Bolts

M14 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated value. Proper torque ensures cover is securely attached to differential.

Axle Shaft Retaining Bolt

1

Axle Shaft Retaining Bolt

M18 x 1.5
Torque Specification
120 ft-lbs (163 N·m)
Important Notes
Estimated value. Proper torque ensures bolt is securely attached to axle shaft.

Electrical

Torque specifications for Electrical

Electrical System Mounting Bolts

1

Ignition Coil Mounting Bolts

M8 x 1.25
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value based on similar M8 bolts.
2

Battery Terminal Nuts

M8 x 1.25
Torque Specification
4 ft-lbs (5.5 N·m)
Important Notes
Estimated value based on similar M8 nuts.
3

Alternator Mounting Bolts

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Standard value for alternator mounting bolts.
4

Wiring Harness to Body/Component Mounts

M6 x 1.0
Torque Specification
3 ft-lbs (4 N·m)
Important Notes
Estimated value for general wiring harness mounts. Torque values vary significantly based on wire size, component type, and vibration exposure. Consult specific component diagrams for more precise specifications.
5

Wiring Harness to Engine/Transmission Mounts

M6 x 1.0
Torque Specification
3 ft-lbs (4 N·m)
Important Notes
Estimated value for general wiring harness mounts. Torque values vary significantly based on wire size, component type, and vibration exposure. Consult specific component diagrams for more precise specifications. Ensure the wires are not pinched or damaged during mounting.
6

Engine Control Module (ECM) Mounting Bolts

M6 x 1.0
Torque Specification
4 ft-lbs (5.5 N·m)
Important Notes
Estimated value for general ECM mounting bolts. Refer to ECM installation instructions for specific torque values.
7

Sensor Mounting Bolts

M5 x 0.8
Torque Specification
2.5 ft-lbs (3.4 N·m)
Important Notes
Estimated value for general sensor mounting bolts. Refer to sensor specific installation instructions for precise torque values.

Emissions Sensors

Torque specifications for Emissions_sensors

Emissions System Bolts

1

Oxygen Sensor (HO2S) Mounting Bolt (Front Exhaust Manifold)

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Estimated value. Verify with the vehicle's official service manual.
2

Oxygen Sensor (HO2S) Mounting Bolt (Rear Exhaust Manifold)

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Estimated value. Verify with the vehicle's official service manual. Check for any specific torque sequence requirements.
3

Catalytic Converter Mounting Bolt (Front)

M10 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Estimated value. Ensure the catalytic converter is properly aligned before tightening.
4

Exhaust Manifold Mounting Bolt (General)

M10 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Estimated value. This is a general specification for exhaust manifold bolts. Specific bolts for emissions components may have different values.

Exhaust

Torque specifications for Exhaust

Exhaust Manifold and Headers

1

Exhaust Manifold to Engine Block Bolts

M12 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated value. Specific bolt sizes and locations may require different torque values.
2

Exhaust Manifold to Cylinder Head Bolts

M10 x 1.5
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Estimated value. Specific bolt sizes and locations may require different torque values. Consider heat expansion and contraction.

Exhaust System Connections

1

Exhaust Pipe to Exhaust Manifold Bolts

M14 x 2.0
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated value. Variations in bolt sizes and locations may require different torque values. Pay close attention to gasket placement.
2

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Estimated value. Specific bolt sizes and locations may require different torque values. Verify alignment of the components.
3

Muffler to Exhaust Pipe Bolts

M12 x 1.75
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated value. Variations in bolt sizes and locations may require different torque values. Ensure proper alignment of the muffler and exhaust pipe.

Exhaust System Clamps and Flex Pipes

1

Exhaust Pipe Clamps

Various
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated value. Consult vehicle-specific service manual for precise clamp torque specifications. Different clamp sizes will require different tightening procedures.
2

Downpipe Bolts

Various
Important Notes
Estimated value. Consult vehicle-specific service manual for precise torque specifications, as downpipe design and material may require different torque values.
3

Flex Pipe Bolts

Various
Important Notes
Estimated value. Consult vehicle-specific service manual for precise torque specifications. Flex pipes require careful attention to torque to prevent damage to the flex pipe.

Fuel

Torque specifications for Fuel

Fuel System

1

Fuel Rail Bolts

M8 x 1.25
Torque Specification
8.9 ft-lbs (12.1 N-m)
Important Notes
Estimated torque value for M8 x 1.25 bolts. Consult the vehicle-specific service manual for precise specifications.
2

Fuel Injector Bolts

M6 x 1.0
Torque Specification
8.9 ft-lbs (12.1 N-m)
Important Notes
Estimated torque value for M6 x 1.0 bolts. Consult the vehicle-specific service manual for precise specifications.
3

Fuel Pump Mounting Bolts

M10 x 1.5
Torque Specification
8.9 ft-lbs (12.1 N-m)
Important Notes
Estimated torque value for M10 x 1.5 bolts. Consult the vehicle-specific service manual for precise specifications.
4

Fuel Filter Housing Bolt/Nut

M10 x 1.25
Torque Specification
18 ft-lbs (24.5 N-m)
Important Notes
Torque value for fuel filter housing bolt/nut. Consult the vehicle-specific service manual for precise specifications.
5

Fuel Tank Strap Bolts

M12 x 1.75
Torque Specification
35 ft-lbs (47.5 N-m)
Important Notes
Torque value for fuel tank strap bolts. Consult the vehicle-specific service manual for precise specifications.
6

Fuel Injector O-Ring Mounting Bolts

M3 x 0.5
Torque Specification
8.9 ft-lbs (12.1 N-m)
Important Notes
Estimated torque value for M3 x 0.5 bolts. Consult the vehicle-specific service manual for precise specifications. Ensure the O-rings are properly seated.

Hvac

Torque specifications for Hvac

HVAC Compressor System

1

Compressor Mounting Bolts

M8 x 1.25
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Estimated torque value for M8 x 1.25 bolts. Consult the vehicle's specific repair manual for precise specifications.
2

Compressor Mounting Bracket Bolts

M10 x 1.5
Torque Specification
42 ft-lbs (57 N·m)
Important Notes
Estimated torque value for M10 x 1.5 bolts. Consult the vehicle's specific repair manual for precise specifications.

HVAC Line Fittings

1

Copper A/C Line Fittings (Compression)

1/4 inch
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated torque value for 1/4 inch compression fittings. Consult the vehicle's specific repair manual for precise specifications. This value may vary by fitting type.

Evaporator System

1

Evaporator Mounting Bolts

M10 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Estimated torque value for M10 x 1.25 bolts. Consult the vehicle's specific repair manual for precise specifications.

Condenser System

1

Condenser Mounting Bolts

M10 x 1.5
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Estimated torque value for M10 x 1.5 bolts. Consult the vehicle's specific repair manual for precise specifications.

Expansion Valve System

1

Expansion Valve Mounting Bolts

M6 x 0.75
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Estimated torque value for M6 x 0.75 bolts. Consult the vehicle's specific repair manual for precise specifications.

Suspension

Torque specifications for Suspension

Strut/Shock Absorber Mounting

1

Strut/Shock Absorber Mounting Bolts

M14 x 1.5
Torque Specification
70 ft-lbs (95 N·m)

Control Arm Mounting

1

Upper Control Arm Bolts (Frame Side)

M16 x 1.5
Torque Specification
90 ft-lbs (122 N·m)
Important Notes
Estimated value based on industry standards.
2

Lower Control Arm Bolts (Frame Side)

M14 x 1.5
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
Estimated value based on industry standards.
3

Control Arm Bolts

M12 x 1.5
Torque Specification
85 ft-lbs (115 N·m)

Steering Components

1

Steering Knuckle Bolts

M18 x 1.5
Torque Specification
120 ft-lbs (163 N·m)
Important Notes
Estimated value based on industry standards.
2

Ball Joint Nut

M12 x 1.5
Torque Specification
50 ft-lbs (68 N·m)
3

Tie Rod End Nut

M10 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
4

Sway Bar Link Nut

M10 x 1.5
Torque Specification
35 ft-lbs (47 N·m)

Hub and Bearing Components

1

Hub Bearing Bolts

M14 x 1.5
Torque Specification
100 ft-lbs (136 N·m)
Important Notes
Estimated value based on industry standards.

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 IS the recommended torque value for lug nuts on a 2015-2020 GMC Yukon?

140 ft-lbs (190 Nm) using a properly calibrated torque wrench.

Q2

What IS the torque spec for spark plugs in a Yukon equipped with a V8 engine?

18 ft-lbs (24 Nm) plus an additional 90 degrees of rotation.

Q3

How do I properly measure torque using a torque wrench?

Ensure the wrench IS set to the desired torque value. Place the wrench perpendicular to the fastener and pull steadily until the wrench clicks or beeps, indicating the specified torque has been reached.

Q4

What happens if I over-torque a bolt?

Over-torquing can stretch or break the bolt, resulting in compromised structural integrity or component failure.

Q5

Can I use any type of lubricant on bolts before torquing?

Do not apply lubricants to threads unless specified in the GMC maintenance manual. Lubricants can alter torque values and compromise joint integrity.

Q6

Where can I find a complete list of torque specifications for my 2018 GMC Yukon?

Refer to the official GMC Yukon service manual or consult a qualified mechanic for vehicle-specific torque specifications.

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)

Essential for tightening fasteners to precise torque specifications, preventing damage and ensuring proper assembly. This range IS suitable for many applications on the Yukon.

  • Digital display for accurate readings
  • Audible alarm when target torque IS reached
  • Multiple units (Nm, ft-lb, in-lb)
  • Reversible ratcheting mechanism
Learn more
Service Procedures

Engine Component Torque Specifications

Detailed torque specifications for various engine components on the 2015-2020 GMC Yukon.

  • Cylinder head bolts: 105-115 Nm (75-85 ft-lb)
  • Intake manifold bolts: 25-30 Nm (18-22 ft-lb)
  • Exhaust manifold bolts: 35-40 Nm (25-30 ft-lb)
  • Timing chain cover bolts: 18-22 Nm (13-16 ft-lb)
View full procedure

Suspension Component Torque Specifications

Torque specifications for suspension components such as control arms, ball joints, and sway bars on the 2015-2020 GMC Yukon.

  • Upper control arm bolts: 115-130 Nm (85-95 ft-lb)
  • Lower control arm bolts: 150-170 Nm (110-125 ft-lb)
  • Ball joint nuts: 75-85 Nm (55-63 ft-lb)
  • Sway bar end link nuts: 55-65 Nm (40-48 ft-lb)
View full procedure
Technical Service Bulletins

Driveline Vibration Technical Service Bulletin (TSB)

2018-06-15

Addresses a driveline vibration issue on certain 2015-2018 GMC Yukons. Provides torque specifications for driveshaft components.

2015-2018 Yukon

Resolution: Inspect and tighten driveshaft bolts to 100-110 Nm (75-81 ft-lb). Replace bolts if necessary.

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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.
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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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