Good power and Mpg
I order the hypertech max tunner for my 03 chevy avalanche 2500 with the 8.1 litter, just to get a little bit more power and mpg, and I was surprised with the results I haven't gone to a Dyno but I definitely feel increase in acceleration and my mpg went up 3mpg more witch is great for the price.
Jet Performance Module Stage 2
This performance module was key to all of my MODs performing as they should. The throttle response is crisp and when pulling through the RPMs and it feels strong. The shift points are higher feels much more performance oriented. My MODs include, Jet Performance Module stage 2, Jet Performance throttle body, full cold air intake, MSD coils, 8.5mm plug wires, shorty headers, throttle body spacer, high flow cats and exhaust. I do run 91+ octane and Royal Purple oil. 5 Stars!
Disappointed in product
I was looking forward to getting the product however, after receiving and using it for about 3 weeks now I have removed it. Every time that it is plugged it continues to cause numerous error messages on the DIC panel along with a rougher than normal engine idol. Error messages that I have received are "Service Suspension System", "Check Engine", "Traction Control Off", "Service Traction Control", "Service Stabilitrack".