Vibrations when holding foot on brake and car is in gear.
10

Asked by 46205 Dec 06, 2018 at 11:12 AM about the 2005 GMC Envoy 4 Dr SLT SUV

Question type: General

Replaced the motor mounts on my 05 Envoy and within 2 weeks one broke! So the vibrations started again, (in any gear with my foot on the brake). Runs fine when taking off from a stop. What would be causing the motor mount on passengers side to break? I checked the transmission mount and it's good. Removed throttle body and cleaned thoroughly, replaced spark plugs and coils, replaced MAF Sensor. All idle pulley's are good, no noises.
U-joints on drive shaft are good. Don't know what else to do :/

2 Answers
11,555

FJ4072 answered 5 years ago

If you did not use AC Delco motor mounts, I can see the fails. After market motor mounts tend to go out very fast on our platform. If you didn't use Delco, go buy Delco and forget about it.

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10

46205 answered 5 years ago

That's the sad part, they were GM motor mounts :/

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