When i left my house to run to the store the gas gauge was reading half a tank. the store i ran to was 6 miles up the road, when i started the car and was coming home i noticed the gas gauge was below a quarter of a tank. by the time i got back home (6 miles away) the gauge was reading between half and a quarter tank. i also had a 2007 silverado that did the same thing, not sure but maybe chevrolet needs to seed a recall out for the fuel gauge sending units. i have talked to other chevy owners that have had the same issue. *tr