Chevy Silverado and GMC Sierra Forum banner

2000 2500 sierra 6.0L

4K views 4 replies 4 participants last post by  DeathSlinger00 
#1 ·
How do I confirm fuel pump failure? Gas guage is faulty, (reads empty then normal on/off). Changed fuel filter, oil pressure shows normal while cranking, replaced relay. Cranks over normal, sometimes coughs or starts for a second then nada.
 
#2 ·
sounds like two separate problems, but still related to one another.

-the issue with the fuel gauge is most likely the fuel level sender is failing. its sold separately from the fuel pump assy. but, you will unfortunately have to pull the pump to replace the level sender, as it is mounted to the side of the pump.
-the "coughing" issue may be the pump itself. you should check fuel pressure at the rail.

depending on what you find, you're still going to have to pull the pump.
 
#3 ·
Agree with Dan. Drop the fuel tank and get the pump and the sender replaced...then see what happens.
 
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top