Join Date: Feb 2009
Location: Saskatoon, Saskatchewan, Canada
The Cortex will show on the screen the last vehicle that it downloaded the stock tune from. Obviously the last vehicle was a GM truck. Even if it was returned to stock it would still show this.
However, I assume you still tried to do a tune? If it's obviously still locked to the previous vehicle, you can pay $100 for superchips to unlock the tuner. I believe it's actually even shown as an upgrade in the update program.
2009 PBM G8 GT
TVS 1900 Maggie w/2.8" pulley (9-10 PSI), Maximizer LTs, High Flow Cats, LS9 injectors, Rotofab CAI, LC-2 WB, 40A KB BAP, TR6ix plugs, self tuned [250+ flashes], Camaro Paddle Shifters, UPR catch can, 4300k HIDs, Remote Start Heated Seat Control Module
, Aeroforce Interceptor Gauge, JBL GTO628's, JL 8w3v3's w/JBL P180.2, Bridgestone RE-11 tires