I am getting a Service Fuel System message... it is really weird. When it first happened, I took it into the local Chevy Dealer, and he wiped my Dyno, and updated the computer... worked great for two weeks, now everytime I fill up, I get this light, then after 10 miles it goes out on it's own...

i have the original Dyno on disk, so I can match everything back up - but haven't yest until I know this issue is going away... any suggestions.

I would replace the gas cap, this has been semi common issue with these cars.

Yeah I would would be looking at the gas cap first

Was it the gas cap?

I would replace the gas cap, this has been semi common issue with these cars.

:iagree: I had same issue with gas cap last year

i had same problem with gas cap.. did that fix your issue.