GMC Terrain 2018-present Body & Frame Bolt Torque Specifications
Comprehensive torque specifications for body bolts on the 2018-present GMC Terrain. Includes detailed procedures and diagrams for proper installation and maintenance.
Important Information
Safety guidelines and reference information for proper torque application
Safety First
- Always verify torque specifications with your vehicle's factory service manual
- Use properly calibrated torque wrenches
- Replace all torque-to-yield (TTY) bolts - they are single-use only
- When in doubt, consult a professional mechanic
Quick Reference Guide
Quick Reference Guide
Common Torque Patterns
Star Pattern
Used for wheels and other circular bolt patterns
Cross Pattern
Used for gaskets and cover plates
Sequential Pattern
Used for head bolts and other critical components
Common Mistakes to Avoid
Common Mistakes to Avoid
Over-tightening
Exceeding the specified torque value can stretch or break fasteners, damage threads, or crack components.
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.
Follow the manufacturer's specified torque sequence pattern.
Dirty Threads
Dirt, rust, or old thread locker can affect torque readings and proper fastener tension.
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.
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.
Check if specs are for dry or lubricated threads. Use specified lubricant when required.
Recommended Tools
Recommended Tools
Torque Wrench (1/4" Drive)
Torque Wrench (3/8" Drive)
Torque Wrench (1/2" Drive)
Angle Gauge
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
Suspension and steering
Components that ensure proper suspension alignment, stability, and steering control.
1 Strut/Shock Absorber Mounting Bolts
M14 x 1.5
Strut/Shock Absorber Mounting Bolts
M14 x 1.5Torque Value
2 Control Arm Bolts
M16 x 1.5
Control Arm Bolts
M16 x 1.5Torque Value
3 Steering Gear/Rack Bolts
M14 x 1.5
Steering Gear/Rack Bolts
M14 x 1.5Torque Value
Brake system
Components that ensure proper brake function and prevent damage to surrounding components.
1 Brake Caliper Bolts
M12 x 1.25
Brake Caliper Bolts
M12 x 1.25Torque Value
2 Brake Caliper Mounting Bracket Bolts
M14 x 1.5
Brake Caliper Mounting Bracket Bolts
M14 x 1.5Torque Value
Body and frame
Components that ensure proper body alignment and prevent damage to surrounding components.
1 Hood Hinge Bolts
M10 x 1.25
Hood Hinge Bolts
M10 x 1.25Torque Value
Important Notes
2 Door Hinge Bolts
M10 x 1.25
Door Hinge Bolts
M10 x 1.25Torque Value
Important Notes
3 Trunk Lid Hinge Bolts
M10 x 1.25
Trunk Lid Hinge Bolts
M10 x 1.25Torque Value
Important Notes
4 Body Mount Bolts
M14 x 1.5
Body Mount Bolts
M14 x 1.5Torque Value
Important Notes
5 Bumper Mounting Bolts
M10 x 1.25
Bumper Mounting Bolts
M10 x 1.25Torque Value
Important Notes
Troubleshooting Guide
Common issues, diagnostic steps, and prevention guidelines
Common Issues
Bolt stretching, stripped threads, uneven torque patterns
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
Diagnostic Steps
Visual inspection, torque verification, thread assessment
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
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
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
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 Why are torque specifications important for body bolts?
Why are torque specifications important for body bolts?
Incorrect torque on body bolts can lead to premature failure. Too little torque and the bolts might loosen, potentially causing a panel to detach or become misaligned, leading to rattling or a damaged finish. Too much torque can strip the bolt threads, making the fastener unusable and potentially damaging the surrounding metal.
Q2 What if I don't have the correct torque wrench?
What if I don't have the correct torque wrench?
Using a torque wrench that's not calibrated or isn't appropriate for the bolt size can lead to incorrect torque values. This can result in the issues mentioned above. Always use a torque wrench calibrated for the specific bolt size and type. Consult the GMC Terrain service manual for the appropriate torque specifications.
Q3 How often should I check body panel fasteners?
How often should I check body panel fasteners?
Regular visual inspection is recommended. Check for any signs of looseness, such as rattling or visible movement. This is especially important after major impacts or repairs. If you notice anything unusual, consult a qualified technician.
Q4 What are the effects of weather on these fasteners?
What are the effects of weather on these fasteners?
Extreme temperatures and humidity can affect the material properties of the fasteners and the surrounding metal. In cold weather, the metal can become brittle, increasing the risk of stripping. Moisture can corrode fasteners, making them weaker. Regular maintenance is crucial in these conditions.
Environmental Considerations
Temperature, humidity, and seasonal effects on torque specifications
Temperature Effects
Includes: High Heat, Cold Weather, Thermal Cycling
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
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
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 calibrated torque wrench is essential for accurate torque application.
- Digital readout for precise torque measurements
- Multiple torque settings for various fasteners
- Durable construction for long-term use
- Clear markings for easy torque reading
Socket Set
A complete socket set with various sizes is required for accessing and tightening the fasteners.
- Various sizes for different fasteners
- Durable construction for long-term use
Ratchet
A ratchet is needed for applying torque to fasteners in tight or hard-to-reach areas.
- Various sizes for different sockets
- Durable construction for long-term use
Extension Bars
Used to reach fasteners in tight or hard-to-reach areas.
- Various lengths for extended reach
- Durable construction
Service Procedures
Body Panel Reattachment Procedure
Detailed steps for reattaching body panels after repair or replacement.
- Verify all fasteners are removed.
- Clean the threads of fasteners and mounting surfaces.
- Apply proper thread lubricant, if required.
- Install body panel using appropriate alignment tools.
- Tighten fasteners to the specified torque values using a calibrated torque wrench.
- Verify proper panel alignment.
- Inspect for damage.
- Perform final torque check.
Door Hinge Adjustment Procedure
Detailed steps for adjusting door hinges to ensure proper operation.
- Measure the existing hinge gap.
- Use the appropriate adjustment tools to adjust the hinge gap.
- Tighten the hinge bolts to the specified torque values using a calibrated torque wrench.
- Test door operation for smooth and proper function.
Technical Service Bulletins
Torque Specification Update for 2018-2023 GMC Terrain Body Fasteners
2023-03-15This bulletin addresses potential issues with incorrect torque application on body fasteners, leading to premature failure.
Resolution: Refer to the updated torque specifications in the latest service manual for correct torque values on all body fasteners.
Body Panel Alignment Issues on 2019 GMC Terrain
2021-10-26This bulletin addresses a problem with body panel misalignment on certain 2019 model year GMC Terrain vehicles.
Resolution: Review the service procedure for body panel reattachment and ensure proper alignment tools are used during installation.
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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.
- Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
- If you're unsure about any procedure, consult a qualified professional mechanic.