'95 suburban gas gauge pinged at E
 

Tested the gauge and its working. Checked the sender GND (-) and its good. Would it be the purple sender wire grounded somewhere between the gauge and the sender itself?

Re: '95 suburban gas gauge pinged at E
 

If you ground the purple wire to frame does the gauge move?
If my memory serves correct, around the steering shaft is a connector that will allow you to test the wires. The fuel pump power, gauge and ground all run threw this 4 or 3 pin connector. Good place to ohm out the wire and test for power.

Re: '95 suburban gas gauge pinged at E
 

Yes, grounding the purple sender wire makes the needle move, thats how i tested it. Forgot to mention, this is carb converted. No electric fuel pump on the sending unit since I replaced it with '6 fuel line to the bottom of the tank. fuel pump GND and 12v wires were eliminated also.

If you change the situation and get a different result...
 

OK if you short the signal wire to ground and it moves in the opposite direction, doesn't that tell you something?

Like the signal wire is open. (infinite resistance)?

Or am I missing something here?

Re: '95 suburban gas gauge pinged at E
 

Sounds to me like a bad sending unit. Sending unit should have residence, you can check it to ground, my money is no bad sending unit being as the fuel level sender is built into the sending unit.