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GMC
Envoy
Engine
Symptoms
Revs Up
Idling issue
2004 GMC ENVOY
166,000 MILES • V6 • 4WD • AUTOMATIC
VIRGIL HOLLAND
MEMBER
1 POST
Idling at 2100 rpm all the time.
Feb 5, 2018 at 9:05 PM
STRAILER
✓
Experienced Mechanic
55,552 POSTS
Hello,
This sounds like you have a vacuum leak or a throttle body that needs to be serviced. Here is a guide to help you do the easy stuff first:
https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge
Here is a guide on high idle in general:
https://www.2carpros.com/articles/engine-idles-too-high
Is the check engine light on?
Check out the diagrams (below).
Please let us know what you find. We are interested to see what it is.
Cheers, Ken
Feb 7, 2018 at 8:12 AM
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