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How to Replace Serpentine Belt Tensioner with Pulley 03-06 GMC Envoy XL

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How to Replace Serpentine Belt Tensioner with Pulley 03-06 GMC Envoy XL

Created on: 2014-08-25

How to repair, install, fix, change or replace a broken, noisy, squeaky, worn or groaning serpentine belt tensioner on 02, 03, 04, 05, 06, 07, 08, 09 GMC Envoy, or Envoy XL.

  1. step 1 :Removing the Air Intake Hose
    • Disconnect the negative battery cable with an 8mm wrench
    • Loosen the two hose clamps from the air intake hose with a flat blade screwdriver
    • Remove the T30 bolt from the air intake box
    • Remove the air intake hose
  2. step 2 :Removing the Tensioner
    • Familiarize yourself with the route of the serpentine belt
    • Insert a 15mm socket and ratchet into the tensioner
    • Turn the socket and pull the belt over the center pulley
    • Release the tensioner
    • Pull the belt off by hand
    • Remove the three 15mm bolts from the tensioner
  3. step 3 :Installing the Tensioner
    • Insert the tensioner into place
    • Hand tighten the bolt in place
    • Tighten the 15mm bolts
    • Pull the belt up and over alternator and tensioner
    • Place the belt correctly on each of the pulleys be following the diagram
    • Pull the tensioner clockwise with the 15mm socket and ratchet
    • Release the tensioner
    • Make sure the belt is on the correct pulleys
  4. step 4 :Installing the Air Intake Hose
    • Insert the air intake hose into place
    • Tighten the two hose clamps with a flat blade screwdriver
    • Insert and tighten the T30 Torx bolt
    • Connect the negative battery cable with an 8mm wrench

Tools needed for replacement

  • Ratchets & Related

    Ratchet

  • Screwdrivers & Related

    Flat Blade Screwdriver

  • Sockets - Metric

    15mm Socket

  • Star Drivers & Sockets

    T30 Driver

  • Wrenches - Metric

    8mm Wrench

Installation Video
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Brought to you by 1AAuto.com, your source for quality replacement parts and the best service on the Internet.

Hi, I'm Mike from 1A Auto. I hope this how-to video helps you out, and next time you need parts for your vehicle, think of 1AAuto.com. Thanks.

In this video, we're going to show you how to replace the serpentine belt tensioner on this 2003 GMC Envoy XL with the 5.3-liter V8 engine. The items you'll need for this include a 15mm socket and ratchet, an 8mm wrench, a T30 Torx bit, and a flat blade screwdriver.

Use an 8mm wrench to disconnect the negative battery cable. Start off by loosening this hose clamp and this hose clamp, then remove this T30 bolt up here. We'll just fast-forward as Mike does that. Now pull this hose free. Then lift that air intake hose up and out.

Next, you want to locate your serpentine belt diagram, which is located right here on the shroud. You just want to refer to this as you're trying to put the belt back in place. Make sure that you have one of these before messing with the belt. Then, using a 15mm socket and ratchet, or 15mm wrench and another wrench for extra leverage, just push down on the tensioner and pull the belt up and over that center pulley.

Carefully relieve the tension on the tensioner. Pull your belt off your tensioner and then remove these three 15mm bolts. We'll just fast-forward as Mike does that. When you remove the last bolt the tensioner will pull free.

Lower your new tensioner back down with the top bolt in place. Then just line it up and hand tighten the bolt. Replace the other two bolts by hand. Then tighten them all up. Now pull the belt back up, over the alternator, and over the tensioner. At the same time, you want to make sure that the belt is on each of the pulleys correctly. Then just double check with your belt diagram that the belt's in the right order and on each of the pulleys.

Put your wrench, or socket and ratchet, onto the tensioner, and pull back on the tensioner. Just push your belt underneath that center pulley. Carefully release the tension, and make sure your belt is on all the pulleys correctly.

Feed your air intake hose back down into place. Make sure it's pushed on all the way. Then push this end back into place. Then tighten up those two hose clamps. Now tighten up the T30 bolt. Reconnect your negative battery cable.

We hope this video helps you out. Brought to you by www.1AAuto.com, your source for quality replacement parts and the best service on the Internet. Please feel free to call us toll-free, 888-844-3393. We're the company that's here for you on the Internet and in person.

Tools needed for replacement:

    Ratchets & Related

  • Ratchet

  • Screwdrivers & Related

  • Flat Blade Screwdriver

  • Sockets - Metric

  • 15mm Socket

  • Star Drivers & Sockets

  • T30 Driver

  • Wrenches - Metric

  • 8mm Wrench

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Serpentine Belt Tensioner

Serpentine Belt Tensioner DIY Solutions

Part Details:

  • Pulley
  • LS Swap
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