Reviewed By Philip T (VALLEY MILLS, TX) Reviewed for a 2004 Chevy SSR —9/27/2017 3:07 AM
I NOTICED A INCREASE IN POWER. MY M.P.G. ALSO INCREASED. GREAT PRODUCT!
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.