My 2005 GMC Sierra 1500 4x4 will run fine and once in a while she will backfire through the fuel injector and I have replaced the plugs, wires,fuel pump and it still does it

Asked by Mar 14, 2015 at 09:28 AM about the 2005 GMC Sierra 1500 SLE 4WD Extended Cab LB

Question type: General

1 Answer

88,995

Could be water in the fuel, usually starts about this time of year, try adding some StaBil marine to the fuel see if that helps.

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