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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 29427
Experience:  GM Grand Master Technician 2007. 14 years experience.
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My 2004 Chevrolet Suburban starts runs great, no lights or

Customer Question

My 2004 Chevrolet Suburban starts runs great, no lights or messages on dash, no decrease in gas mileage and can detect no leaks. But when shut it off you start smelling strong smell of gasoline. It really get strong in garage. The smell is stronger at the rear of the vehicle. What could cause this?
Submitted: 1 year ago.
Category: Chevy
Expert:  GM Tech (Cam) replied 1 year ago.

Hi there, I am cam. Can I get your first name?

How long has this been happening?

Customer: replied 1 year ago.
LeRoy
Has been happening for about two weeks.
Customer: replied 1 year ago.
Are you still there?
Expert:  GM Tech (Cam) replied 1 year ago.

Sorry Leroy, the reply was delayed. This suggests there is an EVAP system leak, this is the system that captures the fumes from the tank. Usually we find the charcoal canister leaking or the vent valve in the back above the rear axle is leaking. I suspect that we need to replace the valve and clean out the canister with compressed air.