99 suburban fuel pump


Old 01-08-04, 01:20 PM
Visiting Guest
Posts: n/a
99 suburban fuel pump

How can I check to see if the fuel pump is working?
Sponsored Links
Old 01-08-04, 02:27 PM
Join Date: Apr 2002
Location: Pittsburgh,Pa
Posts: 2,417
If you remove the gas cap put your ear next to the filler neck and have someone turn the key on if it's working you should hear it run.Check the fuse,relay and pump wiring connector if it doesn't run.Check for power and ground at the fuel pump connector.You will have to lower the tank to check this.

Last edited by davo; 01-09-04 at 02:50 PM.
Old 01-08-04, 07:38 PM
Visiting Guest
Posts: n/a
I just went through replacing a bad fual pump on my wifes 99 Tahoe. I was able to get to the connector on top of the tank without removing the tank from the vehicle. I did have to take the tank out to change the pump but not to get to the connector to check for power.

What I did was put a jack under the middle of the tank with a piece of 2x4 for support. I took the rear tank strap off and then loosened the front strap till the bolt was just threaded through the nut. I was then able to go in from the left rear wheel and use a baseball bat to pry down on the tank enough to get my hand in and disconnect the plug on top of the tank. There is enough wire to get the plug out into the wheelwell to test using a test light or multi-meter.

It worked for me but I had to remove the tank anyway.

Old 01-09-04, 03:52 AM
Desi501's Avatar
Join Date: Oct 2003
Location: Boynton Beach Florida
Posts: 2,207
The tank doesn't have to be moved to test for power. There's almost always a connector within reach before the tank. Even if there wasn't, the wires are at least available leading to the tank. Just find the feed wire. It's usually gray. Remember, it only stays on for 4-5 seconds when the key is cycled on. It can also be tested from the test connector that is usually alongside the relay.

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Display Modes