Action Taken When the DTC Sets
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- DTC P0634 is a Type A DTC.
- The TCM shifts to a default gear, shuts down, and turns OFF.
- The TCM disables TAP shift operation.
- The TCM enables torque management.