Fuel issue

1993 GMC TRUCK

111,194 MILES • 6.5L • V8 • TURBO • 4WD • AUTOMATIC

WILLIE SIDEL

MEMBER
1 POST

Started out on my way home and it spit and sputtered like it was running out of fuel, so I kept going on a prayer. Got home then shut it off waited two hours until it was completely cold. It would not start so I filled the fuel filter full of diesel then after five to ten seconds of cranking it starts. So I check the water drain T valve I crank it open and all I get out of the hose is a drop here and there no steady stream. Help?

Oct 16, 2018 at 7:05 PM

ASEMASTER6371

✓Experienced Mechanic
52,796 POSTS

Good morning.

You have a fuel pump or lift pump that is on the frame rail. It provides fuel from the tank to the injector pump. When this fails, there is not enough fuel for the truck to run.

Roy

REMOVE
1. Negative battery cables
2. Electrical wiring from the pump
3. Harness from the pump support bracket
4. Fuel lines from the pump

^ Use two wrenches to remove the lines

5. Pump support bracket screws
6. Support bracket from the brake lines
7. Pump and bracket from the frame rail

INSTALL

1. Pump and bracket to the frame rail
2. Support bracket to the brake lines
3. Pump support bracket screws
4. Fuel lines to the pump

^ Use two wrenches to remove the lines

5. Wiring harness to the support bracket
6. Electrical wiring to the pump
7. Negative battery cable

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Oct 16, 2018 at 9:21 PM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.