🔧 Traverse - Serpentine Belt Replacement

The serpentine belt on your Traverse drives key accessories like the alternator and A/C. If it’s cracked, squealing, or glazed, replacing it prevents a sudden breakdown and loss of charging or cooling.

Difficulty Level: Intermediate | Estimated Time: 0.8-1.5 hours

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⚠️ Safety & Precautions

• ⚠️ Work on a cool engine; hot parts can burn you.
• ⚠️ Keep fingers/tools clear of pulleys; the tensioner is spring-loaded.
• ⚠️ Support the vehicle with jack stands; never rely on a jack alone.
• ⚠️ Do not start the engine until the belt is fully seated on every pulley.
• Battery disconnect is not required for this job, but remove the key and keep it away from the vehicle.

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🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• Safety glasses
• Mechanic gloves
• 1/2" drive ratchet
• Serpentine belt tool (specialty)
• 15mm socket
• 10mm socket
• 7mm socket
• 3" extension (1/2" drive)
• Torque wrench (20-200 Nm range)
• Trim clip removal tool
• Flashlight

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Serpentine belt - Qty: 1
• Serpentine belt tensioner - Qty: 1 (only if weak/noisy)
• Splash shield push clips - Qty: 4-10 (as needed)

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📋 Before You Begin

• Park on level ground, shift to Park, and set the parking brake.
• Place wheel chocks behind the rear wheels.
• Open the hood and locate the belt routing diagram (usually on a sticker in the engine bay). If it’s missing, take a clear photo of the current routing before removal.
• Plan access: on your Traverse, belt service is typically easiest through the passenger-side front wheel well and lower splash shield.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Lift and secure the passenger-front corner

• Use wheel chocks to block the rear wheels.
• Use a floor jack (rated 3-ton minimum) to lift at the front passenger-side jacking point.
• Set the vehicle down onto jack stands (rated 3-ton minimum).

Step 2: Remove the passenger-front wheel

• Use a 1/2" drive ratchet to loosen the lug nuts, then remove the wheel.
• During reassembly, install the wheel and Torque to 190 Nm (140 ft-lbs) using a torque wrench (20-200 Nm range).

Step 3: Remove the wheel-well liner/splash shield access

• Use a 7mm socket and 10mm socket to remove the small screws/bolts securing the front portion of the liner and lower splash shield (fastener sizes can vary slightly).
• Use a trim clip removal tool to pop out any push clips without breaking them.
• Use a flashlight to clearly see the belt, pulleys, and tensioner.

Step 4: Confirm belt routing

• Use a flashlight and compare the current belt path to the under-hood routing diagram.
• Take a photo before removal.

Step 5: Relieve belt tension

• Place a 15mm socket on the belt tensioner arm bolt head.
• Use a serpentine belt tool (specialty) or a 1/2" drive ratchet with a 3" extension (1/2" drive) to rotate the tensioner and unload the belt. (A serpentine belt tool is a long, thin handle made to reach tight tensioners.)
• While holding the tensioner rotated, slip the belt off one smooth pulley (an idler pulley is best) with your free hand.
• Slowly release the tensioner back to its resting position. Do not let it snap back.

Step 6: Remove the old belt and inspect pulleys

• Pull the belt out through the wheel well opening.
• Spin each pulley by hand and listen/feel for roughness or wobble.
• If the tensioner pulley is noisy or the tensioner feels weak, replace the serpentine belt tensioner now.

Step 7: Route the new belt

• Feed the new belt into position through the wheel well.
• Route it around the pulleys exactly like the routing diagram.
• Make sure the ribbed side seats into ribbed pulleys, and the smooth side runs on smooth pulleys.
• Leave one easy-to-reach pulley for last (often a smooth idler pulley).

Step 8: Apply tension and seat the belt

• Use the 15mm socket with the serpentine belt tool (specialty) (or 1/2" drive ratchet) to rotate the tensioner again.
• Slip the belt onto the last pulley.
• Slowly release the tensioner.
• Use a flashlight to check every pulley: the belt ribs must be fully centered in the grooves.

Step 9: Reinstall splash shield/liner and wheel

• Reinstall the wheel well liner and splash shield using the 7mm socket, 10mm socket, and trim clip removal tool (to reinstall clips without damage).
• Reinstall the wheel and hand-start lug nuts.
• Lower the vehicle using the floor jack (rated 3-ton minimum).
• Use a torque wrench (20-200 Nm range) to Torque to 190 Nm (140 ft-lbs) in a star pattern.

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✅ After Repair

• Start the engine and watch the belt for 15-30 seconds. It should run smoothly with no wandering.
• Listen for squeal or chirping. If you hear it, shut the engine off and re-check belt seating on every pulley.
• After a short test drive, do one more quick visual inspection for correct tracking.

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💰 DIY vs Shop Cost

Shop Cost: $180-$350 (parts + labor)

DIY Cost: $35-$90 (parts only)

You Save: $145-$260 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.8-1.5 hours.

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🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.