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2005 GMC Sierra 1500

Jstevens7700

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Jstevens7700 Enthusiast

Jstevens7700

Posted
Posted

New fuel pump installed by a local shop. Fuel gauge worked when i brought it there now it is not and they cant figure out why. R and r fuel pump not sure where it came from. Gauge only moves when you cut off the key other than that stuck on 3/4. Anyone else have that problem and how do I fix it?

 

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riverbanks Senior Enthusiast

riverbanks

Posted
Posted

Compromised connection at sending unit,many times a old pump while failing,maxes the circuit,weak link is the connection

sefiroxx Enthusiast

sefiroxx

Posted
Posted

There is a tsb on the plug redesign done by gm.

Also, most after market fuel pumps come with a new pigtail as the wires on the old ones often chafe.

Jstevens7700 Enthusiast

Jstevens7700

Posted
  • Author
Posted

The only one i could find that matched what the shop charged me was a delphi pump. Is there any known problems with these pumps?

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carkhz316 Enthusiast

carkhz316

Posted
Posted

I'm going to bet that the pump harness has been changed already in the past, and the splices are failing. Even with the proper heat-shrink butt connectors, I've had them fail and had to fix them. I wonder if they bothered to replace the connector (typically supplied with all the new pumps), or if they left it and now after disturbing it, it is making a erratic connection on the fuel level circuit.

Jstevens7700 Enthusiast

Jstevens7700

Posted
  • Author
Posted

Im not for sure but they said they put a new plug on yesterday. I would have to look at the splices to see if they might have come loose. I hit a bump in my yard and the gauge went from stuck on 3/4 to stuck on empty.

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riverbanks Senior Enthusiast

riverbanks

Posted
Posted

When did you hit the bump, before or after plug replacement? If after,you can do a wire wiggle test,while someone is watching gauge,any where you can along frame,stuff happens,read thru this site,it's seen it all

riverbanks Senior Enthusiast

riverbanks

Posted
Posted

Yep on wires,now short story,I picked up a new mower battery at advanced this spring,on sale,in flyer,got there,clerk said, delivery was moments ago,totes not gone thru yet,I asked,could you get the battery from one,he got pissy,so for the next 5 minutes,I heard totes flying, banging in back room,what's the odds that they had ruined product?

Jstevens7700 Enthusiast

Jstevens7700

Posted
  • Author
Posted

This was I believe an auto zone pump not by choice. It is a delphi which i heard is the stock pump but there's always been bad parts. Is there a way to test the float sensor if i were to pull out the pump?

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riverbanks Senior Enthusiast

riverbanks

Posted
Posted

I use Delphi, good pump,if you're taking it out, just warranty it, maybe the wiper is barely making contact

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