CTS V8-5.7L VIN P (2004)
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Fuel Filler Cap: Description and Operation
FUEL FILLER CAP
NOTE: Use a fuel tank filler pipe cap with the same features as the original when a replacement is necessary. Failure to use the correct fuel tank filler
pipe cap can result in a serious malfunction of the fuel system.
The fuel tank filler pipe is equipped with a ratchet action in order to prevent over-tightening.
The turn to vent feature allows the fuel tank pressure relief prior to removal. Instructions for proper use are imprinted on the cap cover. A vacuum
safety relief valve is incorporated into this cap.