# 2004 GMC Envoy rough idle (vibration at idle)

**URL:** <https://community.cartalk.com/t/2004-gmc-envoy-rough-idle-vibration-at-idle/77222>\
**Category:** Maintenance/Repairs\
**Created:** [February 8, 2013, 2:52am UTC](https://community.cartalk.com/t/2004-gmc-envoy-rough-idle-vibration-at-idle/77222 "2013-02-08T02:52:32Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![agentdenim](https://avatars.discourse-cdn.com/v4/letter/a/e0b2c6/32.png) [@agentdenim](https://community.cartalk.com/u/agentdenim)\
**Post date:** [February 8, 2013, 2:52am UTC](https://community.cartalk.com/t/2004-gmc-envoy-rough-idle-vibration-at-idle/77222/1 "2013-02-08T02:52:32Z")

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Hi Cart Talk Community!  
I have a 2004 GMC Envoy w/130K+ miles that just went in for maintenance. One of the things my mechanic was fixing for me was a rough idle, vibrating strongly enough to rattle the mirrors and glass. He replaced a very loose and failing water pump, and I will say that the idling is better, but it’s still a little rough. The one problem was hiding another. Once I accelerate, no problems; nothing in park or neutral, only idling in drive. No CEL, no codes from the computer. My mechanic thought engine mounts might need replacement, but I thought I’d check what other smart-like car-folk may think. You know, a crowd-sourced second opinion.  
Thanks!

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**Author:** ![system](https://global.discourse-cdn.com/cartalk/original/3X/1/d/1d47c66a543aa6c5a7873bb2320858f978ff52ed.png) [@system](https://community.cartalk.com/u/system)\
**Post date:** [February 8, 2013, 3:33am UTC](https://community.cartalk.com/t/2004-gmc-envoy-rough-idle-vibration-at-idle/77222/2 "2013-02-08T03:33:47Z")

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If it doesn’t vibrate in park but vibrates in drive, jack up the engine slightly to get the weight off the frame. If it’s now better, then I would have to concur that the mount(s) need replaced. Not that uncommon.