GMC Acadia 2017-2019 Suspension Bolt Torque Specifications & Fastener Values
GMC Acadia 2017-2019

GMC Acadia 2017-2019 Suspension Bolt Torque Specifications

Detailed torque specifications for suspension bolts on the 2017-2019 GMC Acadia, including front and rear suspension components.

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

Strut Shock Absorber

This subsystem includes all components related to the mounting of struts and shock absorbers, which are critical for maintaining suspension alignment, ride quality, and stability.

1

Strut/Shock Absorber Mounting Bolts

M10 x 1.25
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Ensure the vehicle is on a level surface and the suspension is unloaded before torquing.
2

Lower Strut Mount Bolts

M12 x 1.5
Torque Value
77 ft-lbs (104 N·m)
Important Notes
Estimated value based on similar M12 bolts in suspension systems.
3

Upper Strut Mount Nuts

M10 x 1.25
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Ensure the vehicle is on a level surface and the suspension is unloaded before torquing.

Control Arm Ball Joint

This subsystem includes the control arms and ball joints, which connect the suspension to the chassis and steering knuckle, ensuring stability, alignment, and smooth steering.

1

Control Arm Bolts

M14 x 1.5
Torque Value
77 ft-lbs (104 N·m)
Important Notes
Ensure the suspension is at ride height before torquing.
2

Ball Joint Nut

M12 x 1.25
Torque Value
48 ft-lbs (65 N·m)
Important Notes
Ensure the ball joint is properly seated before torquing.

Steering System

This subsystem includes components related to the steering system, such as tie rod ends and steering gear/rack bolts, which ensure precise steering control and alignment.

1

Tie Rod End Nut

M12 x 1.25
Torque Value
46 ft-lbs (62 N·m)
Important Notes
Ensure the tie rod end is properly seated before torquing.
2

Steering Gear/Rack Bolts

M14 x 1.5
Torque Value
81 ft-lbs (110 N·m)
Important Notes
Ensure the steering rack is properly aligned before torquing.

Sway Bar

This subsystem includes the sway bar and its links, which reduce body roll during cornering and maintain suspension stability.

1

Sway Bar Link Nut

M10 x 1.25
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Ensure the sway bar is properly aligned before torquing.

Subframe

This subsystem includes the subframe and its mounting bolts, which support the suspension and steering components, ensuring proper alignment and stability.

1

Subframe Mounting Bolts

M14 x 1.5
Important Notes
Follow the specified torque sequence to ensure even clamping force.

Rear Suspension

This subsystem includes components specific to the rear suspension, such as trailing arms and rear shock absorbers, which ensure proper alignment and ride quality.

1

Rear Trailing Arm Bolts

M12 x 1.5
Torque Value
77 ft-lbs (104 N·m)
Important Notes
Ensure the suspension is at ride height before torquing.
2

Rear Shock Absorber Mounting Bolts

M10 x 1.25
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Ensure the vehicle is on a level surface and the suspension is unloaded before torquing.

Wheels

This subsystem includes the wheel lug nuts, which secure the wheels to the hub, ensuring the wheels remain securely attached during operation.

1

Wheel Lug Nuts

M12 x 1.5
Important Notes
Always use a star pattern when tightening wheel lug nuts to ensure even clamping force.

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 are the torque specifications for the suspension bolts on a 2017-2019 GMC Acadia?

The torque specifications vary depending on the specific suspension component. For example, the front strut-to-knuckle bolts typically require 140 lb-ft, while the rear shock absorber lower mounting bolts require 85 lb-ft. Always refer to the vehicle's service manual for exact specifications.

Q2

How often should suspension bolts be checked for proper torque?

Suspension bolts should be checked during routine maintenance, such as tire rotations or suspension inspections, or after any work involving the suspension system. Additionally, if you notice unusual noises, vibrations, or handling issues, inspect the bolts immediately.

Q3

Can I reuse suspension bolts after removal?

It is generally recommended to replace suspension bolts after removal, as they are often torque-to-yield (TTY) bolts designed for one-time use. Reusing them can compromise their integrity and lead to failure. Always consult the service manual for specific guidance.

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

Torque Wrench

A precision tool used to apply a specific torque to a fastener such as a nut or bolt.

  • Adjustable torque settings
  • Calibrated for accuracy
Learn more

Socket Set

A set of sockets in various sizes to fit suspension bolts.

  • Includes both metric and standard sizes
  • Durable construction
Learn more

Breaker Bar

A long-handled tool used to loosen tight bolts.

  • High torque application
  • Ergonomic handle
Learn more
Service Procedures

Front Suspension Bolt Torque Specifications

Procedure to apply the correct torque to front suspension bolts on a 2017-2019 GMC Acadia.

  • Lift the vehicle and secure it on jack stands.
  • Remove the front wheels to access the suspension components.
  • Using a torque wrench, tighten the lower control arm bolts to 129 lb-ft.
  • Tighten the strut-to-knuckle bolts to 133 lb-ft.
  • Reinstall the wheels and lower the vehicle.
View full procedure

Rear Suspension Bolt Torque Specifications

Procedure to apply the correct torque to rear suspension bolts on a 2017-2019 GMC Acadia.

  • Lift the vehicle and secure it on jack stands.
  • Remove the rear wheels to access the suspension components.
  • Using a torque wrench, tighten the rear shock absorber bolts to 52 lb-ft.
  • Tighten the rear trailing arm bolts to 129 lb-ft.
  • Reinstall the wheels and lower the vehicle.
View full procedure
Technical Service Bulletins

Suspension Bolt Torque Specification Update

2018-05-15

Updated torque specifications for suspension bolts on 2017-2019 GMC Acadia models.

2017-2019 GMC Acadia

Resolution: Refer to the updated service manual for revised torque specifications and ensure all suspension bolts are torqued to the new values.

Suspension Noise and Vibration Issues

2019-03-22

Reports of noise and vibration from the suspension system due to improperly torqued bolts.

2017-2019 GMC Acadia

Resolution: Inspect all suspension bolts for proper torque and retighten as necessary. Replace any damaged bolts or components.

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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