GMC Troubleshooting Questions? Ask a Mechanic for Answers
the fuel pump module is located right here can you find this module under the back of the truck ?
do you have a multi meter on hand ?
unplug it and meter set to DC volts
turn the ignition key ON
black meter lead into the black wire terminal #1 red lead to the pink # ***** see what you have for volts then move the red meter lead to the orange wire terminal # ***** what does that read for volts ?
can you see if the fuse called ERLS a 15 amp fuse in the under hood fuse box is good ans shows 12 volts at it ?
ok so the pink wire shows no volts at the fuel pump module but the fuse called ERLS shows 12 volts and is NOT blown ?
ok our issue is the wire from that fuse which is the pink wire from that fuse to the module is bad somewhere between the fuse box and module
follow that pink wire starting at the module connector and see if you can find where it is bad if you can not find the wire bad a lot of times it is best to just run a new wire from that fuse to the module
once power is restored at the pink it should operate just fine
also make sure the wiring under the fuse box is not cut or chewed through as best you can
how are you making out ?