It could be the fuse, but mine is because the floater that measures for the gauge is stuck.
Bad dash ground.
There is a float ball in your gas tank that tells the guage what to say. The odds are it is either stuck or has a hole.
Grey
it could be the coil pack it could be the coil pack
The winter of 1993 and 1994.
bad temp sender usually. Bad gauge rarely.
try replacing the thermostat
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The dealer has to program it.
fuel gage sending unit inside the fuel tank
Chevy's are known for this problem, i just recently had the same problem and what you need to do is replace the fuel sending unit. My original problem had to do with my fuel pump not working and i wasn't really worried about the gauge but we figured since we had the tank down we might as well swap the sending unit and my gauge starting working. Good luck