🔧 Impala - Serpentine Belt Replacement

Your Impala’s serpentine belt drives key accessories like the alternator and A/C compressor. Replacing a worn or cracked belt prevents squealing, charging issues, and sudden breakdowns.

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

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⚠️ Safety & Precautions

• ⚠️ Work on a cool engine; the belt area is near hot parts.
• ⚠️ Keep fingers, hair, and clothing away from pulleys.
• ⚠️ Support the car with jack stands if you remove the right-front wheel.
• ⚠️ Do not start the engine until tools are cleared from the belt path.
• 🔋 Battery disconnect is not required for belt-only replacement, but keep the key fob away from the car so it can’t be started accidentally.

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🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Mechanic gloves
• Wheel chocks
• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Breaker bar 3/8" drive
• Serpentine belt tool (specialty)
• 15mm socket 3/8" drive
• 19mm socket 1/2" drive
• Torque wrench 10-150 ft-lbs
• Trim clip removal tool
• 7mm socket
• Ratchet 1/4" drive
• Flashlight

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Serpentine belt (6-rib, correct length for your Impala) - Qty: 1
• Fender liner clips (assorted) - Qty: 1 kit

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📋 Before You Begin

• Park on level ground, set the parking brake, and place wheel chocks behind the rear wheels.
• Open the hood and find the belt routing diagram (usually on the radiator support/underhood label). If it’s missing, take a clear photo of your current belt routing before removal.
• If you’ll access from the wheel well: slightly loosen the right-front wheel lug nuts with a 19mm socket before lifting the car.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Create safe access

• If needed for space, raise the right-front corner with a floor jack and support it with jack stands.
• Remove the right-front wheel using a 19mm socket.
• Reinstall lug nuts later and Torque to 140 Nm (103 ft-lbs).

Step 2: Remove the right-front fender liner section (for access)

• Remove the plastic push-clips with a trim clip removal tool.
• Remove small screws (if equipped) with a 7mm socket and 1/4" drive ratchet.
• Pull the liner back just enough to see the belt and the tensioner.
• When reinstalling liner screws, Torque to 3 Nm (27 in-lbs).
• Tip: Bag clips/screws so none get lost.

Step 3: Locate the belt tensioner

• Use a flashlight to find the belt tensioner pulley (a small pulley on a spring-loaded arm).
• Identify the tensioner’s hex for the tool—typically a spot you can fit a 15mm socket onto.
• Tip: The belt rides in ribbed pulleys; smooth pulleys ride the belt’s back.

Step 4: Release tension and remove the old belt

• Install a 15mm socket onto the tensioner and use a breaker bar or serpentine belt tool to rotate the tensioner and unload the belt.
• While holding the tensioner rotated, slide the belt off the easiest pulley to reach (often an upper smooth pulley).
• Slowly return the tensioner to its resting position—do not let it snap back.
• Remove the belt from the remaining pulleys and pull it out.

Step 5: Inspect pulleys and tensioner

• Spin each pulley by hand. It should spin smoothly and quietly, with no wobble.
• If you hear grinding, feel roughness, or see wobble, the pulley/tensioner may need replacement before installing the new belt.

Step 6: Route the new belt

• Match the new belt to the old one for rib count and approximate length.
• Route the new belt following the underhood routing diagram. Make sure the belt ribs sit fully into the grooves on ribbed pulleys.
• Leave the easiest pulley for last (the one you’ll slip the belt onto while the tensioner is released).
• Tip: If one rib is off, it will shred fast.

Step 7: Apply tension and finish installation

• Rotate the tensioner again using a 15mm socket and breaker bar or serpentine belt tool.
• Slip the belt onto the last pulley, then slowly release the tensioner.
• Visually check every pulley: the belt must be centered and fully seated.

Step 8: Reassemble and torque

• Reinstall the fender liner using the 7mm socket and trim clip removal tool (for clips).
• For liner screws, Torque to 3 Nm (27 in-lbs).
• Reinstall the wheel using a 19mm socket. Lower the car and tighten with a torque wrench to 140 Nm (103 ft-lbs).

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✅ After Repair

• Start the engine and let it idle while you watch the belt for 20-30 seconds. It should run smoothly with no hopping or wandering.
• Listen for squeal or slapping noises. If present, shut it off and re-check belt routing and belt seating on every ribbed pulley.
• Take a short test drive, then do one more quick visual check.

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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 0.8-1.2 hours.

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🎯 Ready to get started?

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