flhrciblueice said:Allison is $1095 and zf-6 is -$1200 in GMC. Allison is $2295 and zf-6 is $0 in Chevrolet. That is what they were when I ordered my truck in September. It all evens out though. My truck in a Chevrolet would have been approx $600 cheaper than the GMC, sticker vs sticker. GMC always seems to be a little higher than an identically equipped Chevrolet. At the time, I liked the GMC front end a lot better. The Chevy has grown on me, but I don't regret the choice I made.