Hello, I have a 99 caddilac deville d'elegance. Today the computer started beeping telling me I was empty. I kept driving for bit and all of a sudden the dashboard said I had 16 gallons of gas. Does this cadillac have a reserve tank? Thx!

 

No reserve tank. Fuel level sensor /sender maybe on it's way out. Tank has to come out to replace it. on some cars it can be replaced separately on others its a fuel pump and sender assembly