Ok - I love Bonnevilles, I've had 4 over the past 15 years. My 2002 has a messed up gauge. It seems to work until it hits half and then it bounces back up to near full even when tank is almost empty. I now use the trip odometer to tell when to fill up again!
Last week, we inherited a '97 with 110k miles. Fuel gauage showed near full. Because I'm paranoid now, I took it to gas station - it took 16.2 gallons! (what is the capacity?)
Anyway, why are these gauage so messed up? Didn't Pontiac learn anything before they made the last models like my 2002?