It is common for the fuel level sensor in the fuel tank read the fuel level incorrectly. The sensor must be replaced to correct the condition. Our technicians recommend having the complete fuel pump module replaced on high mileage vehicles.Google+
Car Problem Reports
GMC Sierra 1500 Fuel Level Sensor Failure
GMC Sierra 1500 Problem
Average Mileage: 121,360 mi (3,600 mi - 252,000 mi)
Visitor, 2000 GMC Sierra 1500
Truck will be idle, low fuel light comes on. I can start the truck, and will have full tank of gas, will say low fuel
Visitor, 2001 GMC Sierra 1500
no matter how much fuel is in the tank the guage always shows empty, getting very frustrated
Visitor, 2001 GMC Sierra 1500, 89,531 mi
The low fuel light and fuel guage both indicate no fuel, yet I may have just filled the tank. The light and guage make alternately go on and off at any time, moving or stopped and with any amount of fuel in the tank.
The problem has not been repaired yet.
Visitor, 2000 GMC Sierra 1500, 70,000 mi
It will not read full when it is full , it has a tendency to go to empty which causes the empty fuel light to come on. I never fixed it.
Visitor, 2010 GMC Sierra 1500, 12,000 mi
As an example, I can go out and start my truck, and the fuel range indicator read "75 mile range" left to travel and the fuel gauge stating I have about an 1/8th of a tank of gas left. Go about two (2) miles down the road to the hardware store, go inside, come out and start the truck and the "low fuel warning" light will be on and the fuel gauge indicator will be buried on E. When this situation happens and I will stop and fill it up only to discover that it will only take between 15 to 21 gallons max. The window sticker and manual for this truck indicates it has a 26 gallon fuel tank. GM said this is normal to have variations in fuel ranges. Probably my last GM vehicle.
Visitor, 2005 GMC Sierra 1500, 57,000 mi
FUEL GAUGE GOES 1/4 TO EMPTY AFTER U PUT IT IN GEAR. I PULL UP ON A GRADE AND IT GOES BACK UP TO 1/4.
Visitor, 2000 GMC Sierra 1500, 120,000 mi
I bought the truck new in 2000,This problem with the fuel sensor occur right after I had the throttle body replaced in 2005, the service rep at the GMC dealer told me at that time it would cost in the neighborhood of $500 to repair I,ve always had a whistling sound coming from the gas tank since the truck was new, I have just put up with the imperfection since
Visitor, 2005 GMC Sierra 1500, 54,300 mi
Fuel guage inaccurate. Fuel guage reads empty but tank takes only 14 gallons.
Visitor, 2005 GMC Sierra 1500, 114,000 mi
My gas gauge stopped working and showed below E. Check engine light came on. In wiring harness on left frame rail I snipped the purple wire that goes to the fuel level sensor and measured 5 volts on the gauge side of this wire. I then installed a 100 ohm resister to this wire and grounded the other end of resister to the frame. Got the resister from Radio shack and now my gauge reads 3/4 tank. Engine light went off, will clear codes completely with the On Board Diagnoster and can get truck inspected. This is a quick fix and does not make the gauge work but I have on board computer that tells me how much fuel I have used. Will be pulling the bed off and lifting with an engine hoist when the fuel pump starts acting up. GM dealership sells additive to clean fuel level sensor but Marvel Mystery oil in tank might work as well if you don't want to do the wiring first. Hope this help out.
Visitor, 2001 GMC Sierra 1500, 120,000 mi
fuel gage goes between quartertohalf to3quarters tofull and toempty you never know