1999 Chevy Blazer Fuel Pump

JSHELTON88

MEMBER
1999 CHEVROLET BLAZER
6 CYL
4WD
AUTOMATIC
155,000 MILES

We recently purchased a 1999 Chevy Blazer 4 door and 2 weeks later the fuel pump went out. We replaced the pump and new tank. Now one week later the fuel pump is out again. IS there something that would cause the vehicle to burn up two pumps? Is there anything that we can do to prevent this on future replacements. Any help would be appreciated Cause I just dont know what else to try.

1 Reply

PEAR69

MECHANIC
1,482 POSTS

The pump may not be burnt up at all. First, make sure you have voltage at the pump by testing the electrical connector at the pump. These connectors are nortorious for becoming loose and causing all types of connection problems. It is best to just replace these connectors. Then clean up the fuel pump ground connection located just before the fuel tank -- it is the black wire that terminates to the frame cross member and breaks out of the harness just before the fuel tank. If there is no voltage at the pump, check the fuel pump relay under the hood. If it is real hot - replace it. Next, be sure that you have proper oil pressure. If you do, the oil pressure sending (OPS) unit may be faulty. The OPS unit will shut off the fuel pump when it is faulty or when there is no oil pressure. It does this by breaking the circuit at the fuel pump relay. Check for control voltage at the relay.