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GM Tech (Cam)
GM Tech (Cam), GMC Mechanic
Category: GM
Satisfied Customers: 5783
Experience:  GM Grand Master Technician 2007. 14 years experience.
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I have 2007 GMC 1500, between the speed of over 30 mph and

Customer Question

I have 2007 GMC 1500 , between the speed of over 30 mph and under 60 MPH ,once at a set speed, the RPMs will drop off by 100rpm or so , and then instantly, corrects itself. It will do this right up until your over 60 mph.
it doesn't do it when it's cold. Only starts after it up to normal running temps.
Submitted: 7 months ago.
Category: GM
Expert:  tim's auto repair replied 7 months ago.

Hi, My name is ***** ***** for the delay.

I will do my best to assist you.

does the engine light stay on?if so,can you give me the computer codes?

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