I have the classic Pontiac erratic fuel guage in the dash. Jumps all over the place. I replaced the fuel pump and my mechanic verified its working correctly. So the clusters are jacked up. My volt meter jumps all over the place as well. So i am sure my clusters/guages have to be swapped out.

However... my check gages light came on last night. I figured i was low on gas. So I got some gas and the light went off So does the LOW FUEL warning work even though the Fuel Guage is all over the place? Seems like it does... but still asking.