Chevy Silverado and GMC Sierra Forum banner
1 - 1 of 3 Posts

· AutoTech
1,838 Posts
given the fact that the ecm is now operating on an edited calibration I would start there. If it's not kicking codes than the Ecm thinks it's normal operation. So normal operation needs to be corrected. Idle speed vs wheel speed relative to trans gear needs corrected. In short find a good tuner and have this corrected.
1 - 1 of 3 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.