Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum banner

Custom pcm tune

2K views 1 reply 2 participants last post by  kelly@pcmofnc 
#1 ·
Is it possible to tune 3rd shift position for towing but have different tune for 4th? I have 02 4x4 LS with 4200 and built trans
 
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top