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Ask Gm Tech (Cam) Your Own Question
Gm Tech (Cam)
Gm Tech (Cam), GMC Mechanic
Category: GMC
Satisfied Customers: 1686
Experience:  GM Grand Master Technician 2007. 14 year experience.
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I just bought a 2005 envoy and i was sitting at light it

Customer Question

I just bought a 2005 envoy and i was sitting at light it accelerated on its own
JA: Just to clarify, what are the exact lights you're talking about?
Customer: Traffic light
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: I don't know what it is
JA: Anything else you think the mechanic should know?
Customer: Yea i had brake applied and the car was trying to go on it own rpms started rising im at work scared to drive home please help
Submitted: 1 year ago.
Category: GMC
Customer: replied 1 year ago.
I really need the help now before i gotta leave for work
Customer: replied 1 year ago.
Leave work
Expert:  Ryan Schott replied 1 year ago.

If you can get the codes read from the engine that would help but i would suspect that you got either a throttle body problem or an air leak. I would first check if your intake bolts are tight, due to the intake being plastic they tend to loosen over time and will pull unmetered air and raise RPMS.