I bought my DiabloSport Predator u7185 from a guy on DuramaxForum for $155.00 shipped. I guess i must have gotten lucky. I asked all of the right questions like if it had been unlocked and if it had the latest revision. He sent it to me in the original box with owners manual and even the sticker ...

I just read the top and wanted to give you all of the rquired information for you to best answer my questions.

Make: Chevrolet
Model: Silverado 2500HD
Year: 2004...2004.5 actually
Engine: LLY Duramax Diesel
Tranny: Allison 1000 5spd Automatic
Predator: u7185

I run the 100hp tune in my 04.5 LLY Dmax. I ran it through a unofficial quarter mile the other night. The truck reached the 100mph mark before I hit the quarter mile mark. needless to say I was thrilled. However about the same time I hit 100mph, the tranny also shifted into 5th/OD gear. The truck ...