Intermittent Fuel Low light/Fuel gauge - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mtburg71 · 12-28-2007, 07:27 PM

Ok, here it is. Wifes DD is a 2001 GMC Jimmy. While sitting at a stop light or just parked in the driveway with truck running with over a 1/2 tank of gas the fuel gauge will just drop to E and the fuel light comes on. Has anyone ever expierenced anything like this or have any clues on where I should start to trouble shoot such problem. Thanks for any and all help.

Mike

**53burb** · 12-29-2007, 12:31 AM

GM had a problem with the '99-??? sending units on the trucks. The sending unit in the gas tank needs to be replaced. You can buy the unit separately, or with the fuel pump as an assembly. Either way, the sending unit needs to be replaced. My '99 did the exact same thing until I replaced the entire assembly when the fuel pump went out.

kszygc · 12-29-2007, 05:19 AM

My 99 did the same thing as well. When I changed the pump and sending unit together, (the pump was starting to howl intermittently) the problems went away completely. But before changing the unit, I would verify that the ground connection at the frame was good. Otherwise you have to drop the whole tank, and that ain't fun.

mtburg71 · 12-29-2007, 05:40 AM

Well thanks guys, this gives me somewhere to start. Know of any places to get a decent sending/pump for a decent price, other than the dealer.

kszygc · 12-29-2007, 05:59 AM

I looked online at Autozone, Oreilly's, and Advance Auto Parts. None of them showed the sending unit, only the fuel pump. I would call them up and maybe Napa, and Checker, Wolf, whichever version you have where you are and just ask them. You may be out of luck.

retodd7711 · 12-31-2007, 03:57 PM

My '00 Silverado did the same thing. I had the fuel pump and sending unit replaced. $850 at the dealership. Luckily, when I bought the vehicle they agreed to fix for free. The salesman got his butt chewed out for that one.

**53burb** · 01-07-2008, 04:41 PM

I got mine from Napa. It was a Delphi unit. The same one that the dealership sells. I didn't do this on mine, but I have heard that the taillights can be unplugged, then unbolt the bed & moved back instead of dropping the tank. Its supposed to be easier.

12-28-2007, 07:27 PM	#1
mtburg71 Registered User Join Date: Nov 2007 Location: Temple, Texas Posts: 75	Intermittent Fuel Low light/Fuel gauge Ok, here it is. Wifes DD is a 2001 GMC Jimmy. While sitting at a stop light or just parked in the driveway with truck running with over a 1/2 tank of gas the fuel gauge will just drop to E and the fuel light comes on. Has anyone ever expierenced anything like this or have any clues on where I should start to trouble shoot such problem. Thanks for any and all help. Mike __________________ 1964 GMC SWBFS 2005 Dodge Magnum RT

12-29-2007, 12:31 AM	#2
53burb Senior Member Join Date: May 2004 Location: Queen Creek, AZ Posts: 1,010	Re: Intermittent Fuel Low light/Fuel gauge GM had a problem with the '99-??? sending units on the trucks. The sending unit in the gas tank needs to be replaced. You can buy the unit separately, or with the fuel pump as an assembly. Either way, the sending unit needs to be replaced. My '99 did the exact same thing until I replaced the entire assembly when the fuel pump went out.

12-29-2007, 05:19 AM	#3
kszygc Registered User Join Date: Dec 2007 Location: Tx Posts: 81	Re: Intermittent Fuel Low light/Fuel gauge My 99 did the same thing as well. When I changed the pump and sending unit together, (the pump was starting to howl intermittently) the problems went away completely. But before changing the unit, I would verify that the ground connection at the frame was good. Otherwise you have to drop the whole tank, and that ain't fun.

12-29-2007, 05:40 AM	#4
mtburg71 Registered User Join Date: Nov 2007 Location: Temple, Texas Posts: 75	Re: Intermittent Fuel Low light/Fuel gauge Well thanks guys, this gives me somewhere to start. Know of any places to get a decent sending/pump for a decent price, other than the dealer. __________________ 1964 GMC SWBFS 2005 Dodge Magnum RT

12-29-2007, 05:59 AM	#5
kszygc Registered User Join Date: Dec 2007 Location: Tx Posts: 81	Re: Intermittent Fuel Low light/Fuel gauge I looked online at Autozone, Oreilly's, and Advance Auto Parts. None of them showed the sending unit, only the fuel pump. I would call them up and maybe Napa, and Checker, Wolf, whichever version you have where you are and just ask them. You may be out of luck.

12-31-2007, 03:57 PM	#6
retodd7711 chrome makes it go FASTER! Join Date: Feb 2007 Location: Cleveland Tennessee Posts: 2,884	Re: Intermittent Fuel Low light/Fuel gauge My '00 Silverado did the same thing. I had the fuel pump and sending unit replaced. $850 at the dealership. Luckily, when I bought the vehicle they agreed to fix for free. The salesman got his butt chewed out for that one. __________________ She can't cook and she won't clean. But she looks good in a skirt and she brings me beer. She can stay for now. EDIT:: But she left me anyway, So forget her. 1962 GMC Stepside V6 4 speed My rolling resto thread http://67-72chevytrucks.com/vboard/s...d.php?t=324226 My old farm truck http://67-72chevytrucks.com/vboard/s...=1#post3465005

01-07-2008, 04:41 PM	#7
53burb Senior Member Join Date: May 2004 Location: Queen Creek, AZ Posts: 1,010	Re: Intermittent Fuel Low light/Fuel gauge I got mine from Napa. It was a Delphi unit. The same one that the dealership sells. I didn't do this on mine, but I have heard that the taillights can be unplugged, then unbolt the bed & moved back instead of dropping the tank. Its supposed to be easier.



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