C 2500 Yukon XL 2WD V8-8.1L VIN G (2002)
Fuel Filler Cap: Description and Operation
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.
Fuel Filler Cap
The fuel fill pipe has a tethered fuel filler cap. A torque-limiting device prevents the cap from being over tightened. To install the cap, turn the cap
clockwise until you hear audible clicks. This indicates that the cap is correctly torqued and fully seated. A built-in device indicates that the fuel tiller cap
is fully seated. A fuel filler cap that is not fully seated may cause a malfunction in the emission system.