Great product and very helpful tech support
I was a bit nervous after reading the instructions and warnings about making sure that all devices that use power from the car battery are turned off and/or fuses for them are pulled so I called the Hypertech tech support guys to make sure I wouldn't screw up. The instructions were very clear and the programmer worked perfectly. I was able to turn off the AFM system so my Tahoe no longer goes into V4 mode. I get better gas mileage & more horse power.
I have owned my 2012 Chevy Tahoe for approximately two years. During that time, I have almost been involved in a few accidents because of the throttle delay. My research showed that it was the AFM system that was causing it. The Hypertech programmer removed the AFM programming and my acceleration was immediately improved. O-60 time decreased from 11.5 to 8.99. Gas mileage increased slightly (3-5 mpg). I was preparing to sell the Tahoe, but now I am going to keep it.