I have a Power Programmer for a 2004 GM Trucks/Hummer/H2. Only works on those vehicles and only 2004 model. I bought it for an 03 and did not work.It is compatiable with these motors 4.3,4.8,5.3,6.0,and 8.1. This thing does it all Adjusts Top-Speed Limiter,Engine RPM "REV" Limiter,Cooling Fan "On/Off" Temperatures,Transmission Adjustments, Speedometer/Odometer/Part-Throttle Shifting Corrections.and Back-To-Stock Anytime. I am asking $150.00 this thing brand new was over $350.00 its a bargain. Post in thread only!
Justin