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 George S (SAINT PAUL, MN) Reviewed for a 2011 Chevy Avalanche —5/2/2016 11:26 PM
Easy to install but be sure to follow instruction. (Pull proper fuses). Disconnect (8-4 cylinder) drop out. You will have a smother , quieter and more responsive engine. There are also two options to try the premium option and the regular option I have yet to try their premium option but I am very satisfied with the regular option. For my money it was well worth it.
Reviewed By victor g (MESA, AZ) Reviewed for a 2008 Chevy Avalanche —6/8/2014 2:45 AM
I praise Autoanything for the great prices for name brand products they offer. The Jet Performance Programmer did everything advertised. I am happy with the results. Autoanything needs to speak to its vendors who apparently move its defective product to Autoanything making Autoanything bad. I've had to send back three items to Autoanything because of bad poor quality or workmanship...not the fault of Autoanything.... Autoanything kept its promise.. Went extra mile of replacing every item..