Reviewed By Richard S (JANESVILLE, MN) Reviewed for a 2008 GMC Sierra —10/4/2017 3:09 AM
good product , easy install, great price , easy to program
Reviewed By Linda R (Titus, AL) Reviewed for a 2008 Chevy Trailblazer —10/19/2017 4:11 PM
Jet seems to be the only programmer that works for the 4.2 chevy inline 6. No problem with the installation and I noticed an instant increase in the low end power. this is where the 4.2 really sucks. Don't know why they did not use the 4.3.