Depends on what year Cutlass Supreme you're referring to...
i have 1991cutlass supreme v6 my digtial gas gage stuck
If your battery was dead and you jumped it to get it started and the gauge shows your not charging you need to replace the alternator.
Most likely either a bad float in the fuel tank or defective gauge
If the gauge is reading hot and the car is running normal temperatures, the water temperature sensor needs replaced.
It takes a special gauge to install the crank sensor. It can be rented from some parts stores.
I have a 90 cutlass supreme. Mine has been going goofy for some time now. If it blacks out, flashes off and on, or shows different readings on fuel gauge, odometer or speedometer then you have problem. I took it out and looked for loose plug wires(1 plug) or cicuits. Found none. Needs replaced. Can sometimes be found on Ebay for cheap price. If so make sure it right one!!!
your ma
cutlass supreme,is under glove box,lift up the front and pull up.
The speedometer and gas gauge going out tat the same time indicate an electrical problem. The instrument cluster may have to be removed and the circuit board checked for loose connections or cold solder joints.
take it in to the dealer and have them adjusted as they have a gauge they put on the lights to get them set perfect, if there not set right you will end up blinding someone coming at you or you will be way off on the headlight aim.
Yes if one or more gauge is reading wrong
I believe it was 1966 and 67.