1999 GMC Safari fuel pump

  • 1999 GMC SAFARI

Electrical problem
1999 GMC Safari 6 cyl All Wheel Drive Automatic 139000 miles

I recently changed my fuel pump because my van broke down on the side of the highway. I was always able to hear the fuel pump start once the key was turned on and I could no longer hear it. I assumed it was the fuel pump. Once changed I still could not hear nor start my vehicle. I was wondering if there could be a problem with my wiring. If so, do you have a diagram or an answer to help me figure this out?

Do you
have the same problem?
Thursday, May 8th, 2008 AT 5:49 PM

1 Reply

  • 10,535 POSTS

I would start off by checking the fuel pump relay which is located in the underhood fuse/relay box.

Connect a test light between fuel pump test terminal and ground turn the ignition on the light should illuminate for 2 seconds then go out, if not check the relay.

Also check the fuel pump fuse. If htose are both good check for a short in the fuel pum wiring harness.

Was this
Thursday, May 8th, 2008 AT 6:48 PM

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