1997 Lumina LS 3.1l. Looking for some input on my fuel gauge problem. Gauge had been working fine and then started going to full when tank reachs about 1/4 mark. Once filled up gauge works again until reaching 1/4 tank and back to full. See the sender is on the fuel pump in tank. Any input if it appears to be a sender or what you have seen in simialr scenarios? Also see conflicting info if I must drop the tank or not to repair. Any advice is appreciated.
Thanks!