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Hello all my 01 Yukon 5.3 4x4 is throwing a p0440 code after the fuel pump replacement it did not throw any codes before the pump was replaced, the cap is on tight any thoughts? thank you for any insight to this? A code P0440 could mean one or more of the following has happened: The gas cap...

so i guess i am the first poster? hello and happy to be on board.