Mine is dead. It reads at about 3 pm on that gauge in the cluster never moves. Is there a simple fix, fuse or is it like most old cars back then, it is a bad ground and or the sending unit is dead?
Read this- http://www.v8buick.com/index.php?threads/fuel-gauge-and-sender-operation-and-diagnosis.330220/
I was able to disconnect the line to the gas tank in the trunk. When I ground the wire to the gauge it went to empty. When I hook the lines back up, back to WAY past full, about 3 pm on whole gauge. I took off the little ground wire on the trunk latch unit and cleaned it up, no difference. Looks like a sending unit issue for me.
