bought a used plow truck

[DavidS]

Originally Posted by ILuvPizzaTimes10

those have bad grounds under the drivers door. well closer to the bed. its a small bolt on top of the frame rail with a black wire coming from it. usually the problem with the bad gauges. or you are right and its the sender. if you are doing pump yourself pull the bed. easier then dropping tank and dealing with evap hoses that are brittle and 15 years old.

I took a look this morning and could not find the ground.

Online, I found a guy with a 94 GMC 1500. Like you said, he found his ground connected on top of the frame. It was under a electrical connector. I'll probably have to wait until I get the bed off to check this ground.