2005 z71 5.3
Have the vehicle scanned for actual trouble codes. Post them back here. Never heard of fpt code.
All codes relate to the evap system. ..purge valve, canister, fuel cap
Ok, then there is a problem with the EVAP system. If you live in a state that requires emissions test, you would need to have this fixed to pass emissions. Otherwise you can keep driving it without a problem.
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