02 envoy serpentine belt - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 Vortec 4.2L I-6 Engine and Drivetrain > Engine Tunes/Mods

Engine Tunes/Mods Performance Engine Tuning/Engine Modifications

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  #1  
Old 09-07-2009, 03:32 PM
glenjw1969 glenjw1969 is offline
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02 envoy serpentine belt

Hey all-

How difficult is replacing the serpentine belt on an 02 Envoy SLT? Should I take it to the shop or is it readily accessible w/o too much trouble?

-Glen
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  #2  
Old 09-07-2009, 04:25 PM
91RS 91RS is offline
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It isn't too dificult, you just need a 3/8 ratchet (long handle is better) and there's a square hole in the tensioner the ratchet will go straight into and then you can move the tensioner and remove the belt. Make sure you make a diagram of how the belt routs before you take it off if you're forgetful! Do it when the truck is cold, that way you won't burn yourself.
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  #3  
Old 09-07-2009, 05:06 PM
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lynch55 lynch55 is offline
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Very easy! Even a cavem-----well you know what I mean
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Old 09-07-2009, 05:21 PM
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Hal Hal is offline
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Page 28 has the drawing of the belt routing.
http://media.gm.com/division/powertr.../4200_Tech.pdf
You may want to consider replacing the idler pulley while you have the belt off. It's not very expensive and only one bolt.
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  #5  
Old 09-07-2009, 06:46 PM
91RS 91RS is offline
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I wouldn't worry about the idler pulley, those aren't a problem on an 02. I think those didn't become a problem until 05.
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Old 09-07-2009, 08:39 PM
glenjw1969 glenjw1969 is offline
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Thanks!

Wow- thanks for the advice!

I've got some front end damage to repair (grill and headlight) so I think I'll make a project of it and do plugs, belt, and clean out the throttle body as well.

Hope this helps my rough idle... I've read a few posts and it sounds like a common issue.

Thanks for all the helpful comments here and in my other posts!

-Glen
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  #7  
Old 09-07-2009, 09:40 PM
Loverotties Loverotties is online now
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Isn't their two sizes of belts(depending which amp alt. you have?)How do you know which one you have(is it stamped on it?)havn't looked at it yet.I have a LTZ that's loaded so I guess I have the bigger alt.
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  #8  
Old 09-07-2009, 09:43 PM
91RS 91RS is offline
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There's one for SWB and one for LWB.
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Old 09-07-2009, 09:57 PM
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lynch55 lynch55 is offline
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They are different belt sizes for LS and LTZ According to AutoZones website.
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  #10  
Old 09-08-2009, 12:12 AM
WOOLUF1952 WOOLUF1952 is offline
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Quote:
Originally Posted by 91RS View Post
There's one for SWB and one for LWB.
The long wheel base gets the short belt. The difference is the size of the PS pump pulley.
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