[Wacker]

Also...When AFM activates it puts the TCC into a state of commanded slip. Most logs show around 50 RPM slip while still applying pressure. GM did this to aid in the smooth transition from 4 to 8 cylinders. What this means for us aftermarket converter guys is a very short converter life unless AFM is deactivated. Most if not all tuners will do this, even most handhelds will as well. You can deactivate AFM without a tune with this step by step procedure.

1. Select M on the shift selector.
2. Tap up to display 6th
3. Tap down to display 5th
4. Tap back up to 6th

At this point AFM will be deactivated and won't reactivate until the shift lever is moved back to the D position.