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.
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".
Good Programmer, did exactly what i bought it for
AutoAnything had fast, on time shipping and great packaging. Had a little trouble installing the programmer due to some aftermarket mods(remote start). Eventually got installed by removing some fuses and is now simple to do when switching to a different tune. Saw instant gains in MPG, around 2.5 MPG on economy tune. Also some noticeable torque, power, and acceleration gains on economy which is what I have it on most of the time. Bought mostly for better MPG and did just that.