[zekezoloft]

Fuel Gauge 1997 chevy truck k1500 does not working corrrectly. The complete assembly was replaced in the tank (other reasons) and the fuel gauge still reads incorrectly.

[CaptainRich]

Where did you obtain your replacement unit? New or used?
Some of the original fuel level senders have been determined to be subject to significant inaccuracy. A revised part is available.

Other issuse could be poor/faulty connections between the tank sending unit and the instrument panel cluster (IPC), or could also be attributed to a faulty IPC.
A signal generator can determine the validity of the fuel gauge reading. Proper diagnosis will pinpoint your vehicles fault.

[zekezoloft]

Thanks for the reply CaptainRich! It was an aftermarket from Advance Auto Parts. I forgot to mention the Temperature Gauge doesn't work either. Is there a ground connection for the instrument cluster that may be loose? The wires to the battery were all cut at one time, so perhaps a ground wire is missing from the battery?

[CaptainRich]

The Temp gauge receives its ground through the coolant temp sender mounted on the engine. The fuel pump and sender share the same ground: G103 which is also on the engine, next to the thermostat housing.
From the battery Negative terminal there should be two wires: one large high-amperage that attaches directly to the engine, and a smaller wire that attaches to the vehicle body (usually on the inner fender near the battery).
It would be nice to find a loose/corroded ground connection somewhere, but with two gauges inop, I tend to think you have a failed IPC.

[joshuajuline]

Why the fuel gauge on my 1997 chevy siverado always move when I stop and go, or like when I go over a bumb?