2007 Chevrolet Silverado 1500 LT1 4dr Crew Cab 5.8 ft. SB (4.8L 8cyl 4A)
On test drive there was a vibration between 45 to 55 MPH. Then we hit a little small broken pavement in the road and the truck jumps all over the place! Gas mileage is a joke if not an out right lie. We tested the gas mileage in several ways but, keep getting the same results. In town, the best gas to the cheapest gas was only 12 MPG. On the Highway, our biggest accomplishment was at 17 MPG. General Motors said the estimated sticker mileage quote was just a theoretical statement. At 45 to 55 MPH the truck has this vibration and in curves at a lower speed it has this same vibration. If driven from payment to concrete or a bumpy road the truck will dance and shake.
Looks good, good sound system. Easy to get in and out of truck. Interior and exterior is good.
Fix gas mileage - don't lie, make truck perform as advertised to do. Fix chassis from flexing. Fix vibration and wobbling. Fix transmission from slipping.