Avalanche 1500

Erratic Fuel Gauge Operation on Chevrolet Avalanche 1500

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.

Problem Data
RepairPal Verified
Average mileage: 149,200 (60,000–232,880)
4 model years affected: 2002, 2003, 2004, 2005
27 people reported this problem
Viewing 1 - 13 of 13 comments
Gas gauge shows various levels of gas each time the key is turned on. Gauge moves slowly up or down when driving stopping at times.
Don't know if problem is with gauge or sensor.?
At approximately 12 gallons remaining in the tank, I begin to get "low Fuel" warnings and actual fuel gauge will appear to register below "E", then will ease back up to between 1/2 and 1/4 tank within a few minutes.
When I fill my tank up for the first 18 miles my gas gauge reads as empty with the gas light on. Once it has surpassed the 18 miles it reads normal.
Fuel gage reader will move up like a half a tank sometimes when I push the gas but then when I slow down the reading will drop and show me on E when I have a quarter tank of gas in it. Happens off and on. I haven't got it fixed.
I put $50 dollars worth of gas in my tank, around 12 gallons, and when I left the gas station I had a nearly half a tank. (I believe it holds 30 gallons including the reserve.) Not even 24 hours later and not that much driving shows me on my reserve tank again! WTF?!?!?!
When tank is filled, it reads empty for about 50 miles with the low fuel light on. After that it jumps between full and empty for awhile, and around 3/4 tank it starts to read correctly. Problem hasn't been diagnosed or fixed yet.