Righty-o Jordan.

Since my Impala has an LT1 in it, similar to the Corvettes and Camaros, and well, the Corvettes and Camaros have different gear ratios both in the transmission and in the rear end. Mix that with a different tire size, and then you get a tune in my car that is made for a Camaro, you end up with the computer thinking things are different, and the speedometer reads the wrong speed. Imagine that. Not that hard to figure out.

On top of it, the tuner is very very well known in both the F-body world, and the B-body world (Bryan Herter), and I was very disappointed that a mixup occured like that.