6.2 Liter V8 Diesel engine fuel injection, Auto Lockup, 4 SPD TRANS catalyst, feedback fuel system Average City MPG: 16 Highway MPG: 21 Little over 201,000 miles, original motor, runs strong, still gets the average highway mileage Kept it's original shape, brakes reworked, all mechanics from the transmission back has been worked on, virtually new stirring column recently put in New A/C parts but not working at the moment (new compressor and other a/c parts) Topper is included, currently have steel rims but have the aluminum rims (possibly the original) To my knowledge, I think this a rare truck for it is a diesel 1500 Sierra GMC truck. I also have all the original papers such as owners manual, paper work from the moment it was moved brand new off the lot, and in-transit stickers.