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GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 15201
Experience:  GM Grand Master Technician 2007. 14 years experience.
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My '99 Tahoe works well except fast idle. On a level ghway

Customer Question

My '99 Tahoe works well except for a fast idle. On a level highway it will maintain about 40-45 MPH at about 11-1200 RPM. When I come to a stop, it drops to about 650 RPM, which I recall as its pretty normal idle speed. When I release the brake and with no accelerator action, it slowly gains speed and RPM until it's back up to the higher levels as before. What is a likely cause?
Submitted: 1 year ago.
Category: Chevy
Expert:  Tim's Auto Repair replied 1 year ago.

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

I will do my best to assist you.

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