Question about 2002 Pontiac Grand Prix
The most likely reason is going to be the gas cap, either it is loose or has a damaged seal-0ther possibilities could be the vent or purge solenoid, evaporator canister, or fuel pressure sensor. From my experience, 9 out of 10 causes for this is the cap, followed by the vapor canister (due to constantly overfilling the tank when getting gas).
Posted on May 25, 2011
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Posted on Jan 02, 2017
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