1994 GMC Suburban fuelpump relay

1994 GMC SUBURBAN

16,500 MILES • V8 • 2WD • AUTOMATIC

NAILINEYE

MEMBER
2 POSTS
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were is the fuel pump relay located?I have already put a new filter and a new pump still no gas.Please help.

Jun 19, 2009 at 10:27 AM

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JDL

CAR REPAIR CONTRIBUTOR
16,098 POSTS

the relay shows to be located under the hood, on the firewall, a little left of center toward the passenger side.

Also if the datalink connector has a terminal G, if you run B+ to the terminal, the pump should run, use an inline fuse.

Jun 19, 2009 at 12:48 PM

NAILINEYE

MEMBER
2 POSTS

thanks alot,it is exactly were you said,I had already found it though,still no gas thow.I need to find a owners manuel

Jun 19, 2009 at 3:57 PM

JDL

CAR REPAIR CONTRIBUTOR
16,098 POSTS

the orange wire is fusible link, hot all the time. Red wire goes to terminal G at the datalink connector, already talked about that. Gray wire carries voltage to pump when relay is energized. There is also an oil pressure switch in the fuel pump circuit, once you crank it enough to bring up oil pressure and the switch closes, the pump should run, regardless of the relay. The relay itself won't energize with out signal from computer, green wire, white tracer.

Jun 19, 2009 at 4:27 PM