Reviewed By Joe D (Greeley, CO) Reviewed for a 2006 Chevy Avalanche —3/21/2012 9:27 AM
This product worked great, i had replaced my transmition and it was shifting very hard, wiht the Cortex the new preformance and power are fantastic
Reviewed By Henry K (Celina, OH) Reviewed for a 2005 Chevy Avalanche —9/13/2016 8:23 PM
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.