There are 3 relays in the glove box. All 3 are behind the plastic cover in the upper left corner of the glove box. The relay to the fuel pump is the one to the far left.
Fuse/relay center under the hood
in the fuel tank
in fuel tank
in the fuel tank
in fuel tank
what are the symptoms of a bad fuel pump on a 2002 GMC Sonoma 4.3 liters?
In the glove box behind the plastic cover on the left side when sitting in the seat
The fuel pump relay for a 1996 GMC Sonoma is typically located in the fuse box under the hood. You can find the fuse box near the driver's side near the battery. The relay may be labeled on the diagram inside the fuse box cover, but if you have trouble locating it, consult the vehicle's service manual for specific details.
see where the wiring loses power. trace it back, starting at the pump, and go all the way back to the relay
Check fuel pump and fuel filter.
There is a fuel pump relay switch for your 1988 GMC Safari. You can find the fuel pump relay switch at most auto-parts stores.
the fuel pump is a in tank pump, you have to drop the tank, its located inside the tank.