GMC Yukon XL Denali Problems

Erratic Fuel Gauge Operation on GMC Yukon XL Denali

Problem Description and Possible Solution

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.

(45 people reported this problem)

GMC Yukon XL Denali Vehicles With This Problem

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Average mileage: 128,639 (10,300–210,462)
7 model years affected: 2001, 2002, 2003, 2004, more2005, 2007, 2009
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Viewing 1-20 of 21 comments
I replace the fuel pump with a new one and now it don't show how much gas It has what did I do wrong
Fuel gauge is showing empty then full. Will not display miles until empty. Occasionally starts working...
Fuel level reads then it doesn't. When it does it will read the correct amount then quits, back and forth.
Fuel gauge was reading erratic. You could never tell how much fuel you had left. While removing the sender from the tank I noticed allot of corrosion in the sender's terminal housing. There was also one terminal with corrosion on it due to a failed o-ring which was causing the failure of the sending unit. GM has a kit which modifies the connectors, housing and o-rings which includes a new fuel level sender. Before attempting this repair yourself, make sure to get the fuel level in the tank as low as possible. Also while removing the tank, be extra carefull to remove ALL of the vent lines especially the smallest one which is about 4mm in diameter. It can break off very easily. They are located at the front end of the tank. Remove the rear fill hose and large vent hose in the back of the tank, then disconnect the brackets while supporting the tank, drop the back down and slide the tank backwards to expose room in the front of the tank to remove the small vent hoses.
Our fuel gauge would sometimes say we were on E when we had just filled up, or we would be on E one day and have 1/4 of a tank the next day. Our check engine light came on a week ago, we took it in and found out it's the fuel sensor. I was quoted around $500 to repair.
Guage electronically reads a range in which the gas is gone well prior to reaching the guage reading.
The weather temperature got to 99°F & the gas gauge went from quarter tank to full & kept jumping then stopped at half tank & hasnt been right since. Prior to that i had the fuel pump changed at 190000.
My 2004 GMC Yukon XL 1500 series truck's tank is full but the gauge is reading empty no matter how much gas is in there.
Just after i fill the tank and pull out, the low fuel light comes on and the fuel gauge drops. I just try to keep account of how many miles I am allowed on a tank and when the allowment gets low, I fill it back up.