May 3, 2013 #1 J Jen Member May 12, 2008 787 0 16 In my 1990 GMC 1500 pickup truck the fuel pump still runs even after we shut the truck off.Does anyone know why this could be happening? Any educated guesses would be great.
In my 1990 GMC 1500 pickup truck the fuel pump still runs even after we shut the truck off.Does anyone know why this could be happening? Any educated guesses would be great.
May 4, 2013 #2 T tA+t New member Dec 26, 2010 4 0 1 The relay may be bad by continued running or the ignition switch is staying on.
May 11, 2013 #4 J Jack Active member May 12, 2008 1,397 0 36 The switch could be sticking, that would make it keep pumping fuel.