Fuel gauge problem
Just wanted you all to know that I had an issue with my fuel gauge being very erratic lately and most of the time being stuck on full. I looked on here and found most of you saying it was the sending unit. I went out and bought a new sending unit from the dealer. (I work at an automotive repair shop, so I got it at our cost thank goodness.) I removed the access cover in the trunk, unhooked the 2 electrical connectors and the 2 fuel lines. Removed the lock ring and pulled the pump assy. After getting out my trusty DVOM, I checked resistance and found out it jumped all over the place so I knew I was on the right track. I replaced the sending unit, and reinstalled the pump into the tank. Finished the install with the cover and fuel gauge works great.
I went back to the old sending unit and found 2 things wrong with it. The sending unit arm was loose and wobbled back and forth. I also found that the 2 arms that actually sweep the electrical contacts very worn and actually 1 of them was broken. I also noticed before installing the new sending unit that the electrical contacts were actually redesigned and had a much longer contact than the old one. I think GM realized that it was a bad design. I really appreciate your help and you made me much more confident in attempting the repair. I have done many repairs like this before in my shop, but it is slightly different in my own car with my own money. Thanks again!