2008 Chevrolet Silverado 1500 Work Truck 4dr Extended Cab 6.5 ft. SB (4.3L 6cyl 4A)
I too am expericing the terrible mileage. 12 in city, 17 on HWY, V-6. Chevy must have been testing this truck downhill when posting the MPG. Great to drive and up high. Quiet, great audio sound, OnStar is a first for me and love it.
Best feature in just the great ride and low road noise. Lots of room, side doors swing fully open (about time).
Improve MPG. There is no reason to get worse mileage than the Ford I traded in (F-150, V-6). May go back to Ford if mileage does not impove after a year.