GMC Yukon 2015-2020 Suspension Bolt Torque Specifications & Fastener Values
GMC Yukon 2015-2020

GMC Yukon 2015-2020 Suspension Bolt Torque Specifications

Detailed torque specifications for the suspension bolts of the 2015-2020 GMC Yukon, including upper control arm, lower control arm, and shock absorber bolts.

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 mounting

Secures the strut or shock absorber to the vehicle's frame or suspension components, ensuring proper alignment and stability.

1

Strut/Shock Absorber Mounting Bolts

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

Control arm mounting

Connects the control arms to the frame or suspension components, maintaining the vehicle's ride height and stability.

1

Upper Control Arm Bolts (Frame Side)

M16 x 1.5
Torque Value
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 Value
80 ft-lbs (108 N·m)
Important Notes
Estimated value based on industry standards.
3

Control Arm Bolts

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

Steering components

Secures the steering knuckle, tie rod ends, and sway bar links to the vehicle's suspension components, ensuring proper steering alignment and stability.

1

Steering Knuckle Bolts

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

Ball Joint Nut

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

Tie Rod End Nut

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

Sway Bar Link Nut

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

Hub and bearing components

Secures the hub bearing to the steering knuckle or wheel hub, ensuring proper wheel alignment and stability.

1

Hub Bearing Bolts

M14 x 1.5
Torque Value
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 specification for the suspension bolts on my 2015-2020 GMC Yukon?

The recommended torque specification for the suspension bolts on your 2015-2020 GMC Yukon varies depending on the specific bolt and location. Refer to your owner's manual or consult with a certified mechanic for the correct torque specification. Generally, the torque specification for suspension bolts ranges from 70-120 ft-lbs.

Q2

How often should I check and maintain the suspension bolts on my GMC Yukon?

It's recommended to check and maintain the suspension bolts on your GMC Yukon every 12,000 to 15,000 miles or as specified in your owner's manual. Regular maintenance can help prevent loose or damaged bolts, which can lead to uneven tire wear, reduced handling, and increased risk of accidents.

Q3

Can I use a impact wrench to tighten the suspension bolts on my GMC Yukon?

While an impact wrench can be convenient, it's not recommended for tightening suspension bolts. Impact wrenches can apply too much torque, which can damage the bolts or surrounding components. Instead, use a torque wrench to ensure accurate and controlled tightening.

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 torque wrench for accurate torque application

  • Range: 10-150 ft-lbs
  • Accuracy: ±2%
Learn more

Socket Set

A set of sockets for various bolt sizes

  • Sizes: 10mm, 12mm, 14mm
  • Drive type: 3/8" and 1/2"
Learn more

Breaker Bar

A long breaker bar for added leverage

  • Length: 24"
  • Drive type: 1/2"
Learn more
Service Procedures

Suspension Bolt Torque Specification

Procedure for tightening suspension bolts to specified torque

  • Loosen the suspension bolt by turning it counterclockwise
  • Tighten the suspension bolt to the specified torque value (see table)
  • Verify the torque value using a torque wrench
View full procedure

Upper Control Arm Bolt Replacement

Procedure for replacing the upper control arm bolt

  • Raise the vehicle and support it with jack stands
  • Remove the wheel and caliper
  • Remove the upper control arm bolt and replace with a new one
  • Tighten the new bolt to the specified torque value
View full procedure
Technical Service Bulletins

Suspension Bolt Torque Specification Update

2017-03-15

Update to the suspension bolt torque specification for 2015-2017 GMC Yukon models

2015-2017 GMC Yukon

Resolution: Update the torque specification to 120 ft-lbs for the upper control arm bolt

Upper Control Arm Bolt Failure

2019-09-01

Investigation into reports of upper control arm bolt failure on 2018-2020 GMC Yukon models

2018-2020 GMC Yukon

Resolution: Inspect the upper control arm bolt for signs of wear or damage and replace if necessary

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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