Installed New Fuel Pump Assy And....

[jigman586]

when i fired it up(2000 GMC Sierra 5.3) the gas gauge went 180 degrees from empty position and wont move.Any suggestions? I just put in a brand new Bosch unit from Advance yesterday evening.Has my gauge bit the dust? Any help for the newbie will be appreciated.(really new to GMC, too havent had it but a year)

[AirForceAngler]

Sounds like you did something wrong with the wires or the sender in the pump is bad.

[nickvrebel]

the little float piece on the pump assembly is the sensor for the fuel level. sounds like it was broke or not installed where it could freely move.

[jigman586]

Well as far as plugging it in you can plug it in wrong.only 2 plugs and they wont interchange.Could a bad ground cause this? Or possibly not enough gas in tank to hit the float?

[Ironman24]

Well as far as plugging it in you can plug it in wrong.only 2 plugs and they wont interchange.Could a bad ground cause this? Or possibly not enough gas in tank to hit the float?

 

I think yes a bad ground could cause something like this. My gas gauge in my 67 camaro went way past full after I installed a new sending unit. Turns out the ground was bad. once i cleaned up the ground contact it was reading fine again.

[tbagg69]

Did you swap out connectors with the new ones supplied by bosch I know gm had some trouble with the factory fuel pump wiring and now you have to cut the old 1 off and put the new one back on,I had to do it on my Silverado this is what it should look like out of the box

[redvett]

The ground on 1996 and later senders goes back to the PCM.

[rod67]

Just did my 2000 with a $55 pump from Ebay and the gauge reads correct for the first time! Hope it lasts!