i just got a new 2002 GMC SIERRA 2500 CREW CAB SLT 4X4 short bed, with duramax diesel and 5 speed automatic allison transmission. summit white with grey leather...loaded i got $20.5k for my 96' suburban and another $2k off the $44k sticker. this truck is sweet. i demoed a different one for a month and put 1500 hard miles on it before i brought it back because they wouldn't barter enough on price (they offered me $17k for my 96' suburban and wouldn't budge on the $44k truck, what a joke!) i towed my 20' enclosed trailer the whole time and averaged 16-21 mpg on the highway and 14-18 in the city. i ended up going to another dealer in macomb, il. and got one hell of a deal on this one. so far 600 miles and getting 15mpg in town. i'm taking it to springfield, mo. next week with the trailer and will let you know how it does. (hopefully i'll have a good head wind to work against) these trucks have balls....they are the best driving, riding and towing i've demoed. i can nail it from a dead stop and smoke em, if you need to pass on the highway, the turbo spools up and jumps to life. i'll keep you informed.