My 2000 ext cab 4.8l has a strange problem. When the guage is 3/4 or less it reads normal but if I fill it up it will register empty and the low fuel light will come on. This may last a few miles then it will change to 1/4 full then 1/2 full and back to empty , these are seemingly random events and not in that order. It may cange 2-3 times in a minute. Any ideas? Thanks

 

Ive seen allot of these trucks with messed up gages not sure what to do but Argon might im sure he's fixed a few.

 

Almost everyone who has a 00 silverado and years close to that have the same problem, mine works like 1/4 of the time

 

Sounds stupid butI think this is as simple as a bad ground. Had a friend with same problems and all it was, was a bad ground.

 

I got it checked out and they told me it was the sending unit and to fix it i would have to get a new fuel pump and sending unit, and the guy i went to my father has known for many years