04arival71
New Member
I just got a new 04 Z71 and have been reading and trying to figure out the best way to get over the 295 Hp mark. I have been reading that reprogramming the ecm will increase hp and performance. Can anyone tell me if theres a programmer out yet for the 04 5.3
Thanks to all and I LOVE THIS SITE .
Thanks to all and I LOVE THIS SITE .