CTS-V V8-6.0L VIN U (2006)
Fuel Filler Cap: Description and Operation
FUEL FILLER CAP
NOTE If a fuel tank filler cap requires replacement, use only a fuel tank filler cap with the same features. Failure to use the correct fuel tank filler cap
can result in a serious malfunction of the fuel and EVAP system.
The fuel tank filler pipe has a tethered fuel tank filler cap. The fuel tank filler cap requires a quarter of a turn in order to be removed. A torque limiting
device prevents the cap from being over tightened.