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How to check a serpentine belt on a 2004 chevy trailblazer

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What I do to check the belt is to look at the belt and see if it has cracks on the inside. The small ribs or grooves in the belt will have small cracks when the belt needs replaced.

Posted on Oct 05, 2010

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Posted on Jan 02, 2017

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SOURCE: How do you change the serpentine belt on a 2004

Note the drive belt routing, usually there is a sticker under the hood with the routing. using the right socket and a breaker bar, rotate the drive belt tensioner clockwise to relieve tension. remove belt and slowly release breaker bar tesnsion. for V8, Install on all pulleys except generator, loosen tension and install on generator. for 4.2L install belt over all pulleys except tensioner, relieve tension and install over tensioner, slowly release breaker bar tension.

Posted on Mar 12, 2010

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How do I intall a new fan belt on a 2004 envoy. I am not sure witch way it goes around the fan


If there is no diagram pasted in the engine compartment, check your owner's manual...or else go to your local auto store warehouse or Chevy dealership...usually the parts counter person can print out the diagram specifically to your vehicle. Since you did not mention the engine specs- I'm going to generically how to install a serpentine belt.

1.) make a loop and slip the loop around the crank shaft pulley
2.) continue looping the belt around the water pump pulley
3.) ...around the A/C pulley
4.) ...and around the idler pulley
Skip the alternator pulley for now- you want to do that one last.
5.) Continue placing the belt around the power steering pump pulley
6.) and over the belt tensioner pulley
7.) Now move the belt tensioner position so that you can loop the belt over the alternator.
8.) Now double check to make sure that the belt is properly and securely fastened around each pulley's grooves. Don't start the motor until you are absolutely sure... and can visually verify that the new belt is installed properly. And don't have anyone (or pets) standing around the car or open engine compartment when you initially start the car just in case the belt breaks...serious injuries can occur!
I've attached a generic drawing it may or may not fit the description of your auto.

25449384-zbt03x4ihgejmj4dkpthkhgv-2-1.gif

Feb 19, 2015 | 2004 GMC Envoy

1 Answer

How do I replace the serpentine belt on a 2004 Chevrolet Trailblazer EXT V6?


YOU ARE WORKING IN A TIGHT SPOT.YOU WILL NEED THE DRIVE BELT REMOVAL TOOL.YOU CAN BUY TOOL AT ANY AUTO PARTS STORE.

Aug 28, 2010 | 2004 Chevrolet TrailBlazer

2 Answers

Trailblazer serpentine belt diagram


Hi, first, keep this diagram around as you will need it to route the serpentine belt when you reinstall it. There may also be a diagram under the hood by the radiator.
7e98dff.jpg Next, follow this link and watch the video that shows you how to replace a serpentine belt...
http://www.wonderhowto.com/how-to/video/how-to-inspect-and-replace-your-car-s-serpentine-belt-267229/
Take care

Aug 03, 2010 | 2002 Chevrolet TrailBlazer

1 Answer

How do you change the serpentine belt on a 2004 Trailblazer?


Note the drive belt routing, usually there is a sticker under the hood with the routing. using the right socket and a breaker bar, rotate the drive belt tensioner clockwise to relieve tension. remove belt and slowly release breaker bar tesnsion. for V8, Install on all pulleys except generator, loosen tension and install on generator. for 4.2L install belt over all pulleys except tensioner, relieve tension and install over tensioner, slowly release breaker bar tension.

Mar 12, 2010 | 2004 Chevrolet TrailBlazer

2 Answers

I have a 2004 Chevy Trailblazer LS with strange noise.....


If it is making a noise in the belt area, have them check the water pump. These get loose water pump bearings that cause belt noise.

Jun 21, 2009 | 2004 Chevrolet TrailBlazer

1 Answer

I changed the serpentine belt and now there is a humming noise


If you've double checked to make sure belt on properly, you'll have to identify which wheel (pulley) is making noise and check it for any debris that may have built up on it, or possibility of bearing failure in that part. Was it not noticeable with old belt, or was old belt pretty noisy, and that's why it was changed?

Mar 07, 2009 | 2002 Chevrolet TrailBlazer

1 Answer

Serpentine belt replacement on 2002 trailblazer 4.2 l engine


Just replaced the water pump on my 2004 trailblazer the other day, removed the fan to get the water pump out. You do not have to remove the fan just to change the belt.

Dec 27, 2008 | 2002 Chevrolet TrailBlazer

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