Tools You'll Need:
* New serpentine belt: Make sure you get the correct belt size. Check your owner's manual or a parts store for the correct part number.
* Wrench(es): Likely a combination of metric wrenches (sizes will vary depending on your specific tensioner and idler pulleys). You might need a socket wrench and ratchet as well.
* Socket set: This is helpful for accessing difficult bolts.
* Pliers or channel locks: Possibly needed to help with tensioner release, especially if it's a manual tensioner.
* Jack and jack stands (highly recommended): This makes access easier and safer. Never work under a vehicle supported only by a jack.
* Gloves: To protect your hands.
* Safety glasses: Protect your eyes from debris.
Procedure:
1. Safety First: Park the Tahoe on a level surface, engage the parking brake, and chock the wheels. Disconnect the negative battery terminal.
2. Locate the Serpentine Belt: Identify the serpentine belt that runs around the crankshaft pulley, alternator, power steering pump, and other accessories.
3. Identify the Tensioner: Find the tensioner pulley. It's usually a pulley with a pivot point and either a spring mechanism (automatic) or a bolt that allows manual adjustment. This is crucial to releasing the belt's tension.
4. Release the Belt Tension: This is the trickiest part.
* Automatic Tensioner: Usually, you'll need to use a wrench or socket to turn the tensioner pulley. This will move it out of the way, allowing you to slip the belt off. The repair manual will show you exactly where to apply pressure and what tool to use. It's often easier to loosen the tensioner while looking at it from under the car.
* Manual Tensioner: You'll typically need to use a wrench or pliers to loosen the tensioner bolt, allowing you to pivot the pulley and release tension. Again, your repair manual will be critical here. Sometimes, a long pry bar (carefully used) can assist in this process.
5. Remove the Old Belt: Once the tension is released, carefully guide the belt off each pulley. Take note of the belt routing so you can put the new one on correctly.
6. Install the New Belt: Route the new belt around the pulleys in the same order as the old belt. Make sure it's seated properly on all pulleys.
7. Re-tighten the Tensioner: Carefully tighten the tensioner pulley back to its original position (or fully tighten the manual tensioner bolt).
8. Verify Belt Alignment: Make sure the belt is correctly aligned on all the pulleys and isn't rubbing against anything.
9. Reconnect the Battery: Reconnect the negative battery terminal.
10. Start the Engine: Start the engine and listen for any unusual noises (squeaking, squealing). Check the belt for any slippage or misalignment. If you hear anything unusual, turn off the engine immediately and re-check your work.
Important Considerations:
* Consult Your Repair Manual: This is the single most important piece of advice. Your vehicle's manual will have specific diagrams, torque specifications, and procedures that are crucial for success.
* Difficulty Level: While generally considered a moderate DIY repair, difficulty can vary depending on the specific model and engine type.
* Safety: Always prioritize safety. Use jack stands, wear safety glasses, and work in a well-lit area.
* Professional Help: If you're uncomfortable with any part of this procedure, it's best to take your vehicle to a qualified mechanic.
This guide provides a general overview. Referencing your owner's manual is absolutely essential for a successful and safe belt replacement.
