Im not sure about the cal number but the concern was caused by the tuner. The customer said he had the "tune" installed on a trial basis and decided he didnt want it. Hes going to try and get his money back from them. What a dumbass. One other issue the "tune" caused-would not accell or downshift after 80 mph. I initially thought the customer had a "my key" programmed and that I was using it, but after replacing the PCM and test driving the truck, I found it was just as fast as it should be.