drewdogg2

I have a problem w/my c6 'service fuel system' message that comes on every time I full up now. Also the check engine light comes on too. I always use 91 octane and the message disappears after I drive for a short while. Any help will do before I go to the dealer and get soaked. The car has 62k miles.
Thanks

Gary '09 C6

The fuel sending units could have some deposits built-up on them...run a 20-oz. bottle of Techron through
the full-tank (maybe through two tanks) and see if that helps. If you can get 93 octane, use that.

Alex LS3

91-93 won't matter, it's built to handle 91+ since some have 91,2,3,4

Agree to run a fuel system cleaner on next fill up.

z51vett

Fuel filler cap maybe bad causing light to come on go to one of the chain auto stores they will check for codes free. Get some Chevron hightest add a bottle of techron to clean the fuel system.
z51vett
Doug