Hey everyone, I just recently used the MPVI2 to turn off the AFM/DOD on my Yukon (that was all I did). I had 4 credits initially, customer service said I only needed 2, the other 2 were reserved for tuning my 2015 Silverado when I got around to it. Any reason why my Yukon ate up all 4? Any help or info would be appreciated so this mistake doesn't happen again.