Conditions for Setting the DTC
WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Both of the following conditions must occur twice during the same trip:
- Fail Case 1: The TCM commands 1st gear and the resulting gear ratio is 1.58:1-1.75:1 for 2 seconds.
- Fail Case 2: The TCM commands 4th gear and the resulting gear ratio is 0.95:1-1.05:1 for 3 seconds.