Fuel gauge stopped working when I just filled the tank. on 2004 Chevrolet Silverado 1500

Fuel tank is full but gauge reads empty. No low fuel light just gauge reads empty. I have power going to the tank, I checked that. Any ideas? Could my gauge be bad? I know silverados have gauge cluster issues. My truck is a 04 and only has 41000 miles on it. Thanks for any support.... P.S. no codes have come up ......

by in Brookhaven, PA on March 17, 2013
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2 answers 6 comments
ANSWER by , March 17, 2013
Need a scan test with a real scanner, not a code reader at parts store, scanner can sweep gauges (prove out test) to see if gauge is faulty. No need to guess at the problem!
COMMENT by , March 18, 2013
I took a test light and after unplugging the sending unit at the tank, tested to see if by grounding the plug I could get the gunge to move, it did not so I assume the gauge is bad.......
COMMENT by , March 18, 2013
The lnstrument clusters give some trouble but that is a dealer repair as the new cluster will have to be programed!! Do not attempt this yourself, you will not have any luck and will destory the replacement cluster as it will shut down if not flashed by dealer. Can have the cluster rebuilt and put it back without reprogram.
ANSWER by , March 20, 2013
you either have a bad cluster or a sending unit ,check to see if you have a good ground at the sending unit
COMMENT by , March 20, 2013
Thanks, will do. I think the unit is mounted at the back of my fuel tank. I had the plug off and tested for power and it is making it to the unit. I'll see if it's bolted to the frame and check the ground there.....
COMMENT by , March 20, 2013
Pump module is in the front of the tank, just behind the cab.
COMMENT by , March 20, 2013
Thanks, That is the one that requires moving the bed back a little to get to it just my luck.....
COMMENT by , March 20, 2013
Actually you are lucky if you have ever tried to pull th tank on one! Bed is a breeze compared!