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.

P2728

DTC P2728 is a Type C DTC.
The TCM freezes transmission adaptive functions.

P2729

DTC P2729 is a Type A DTC.
The transmission defaults to 2nd gear or reverse gear.
The TCM forces TCC OFF.
The TCM freezes transmission adaptive functions.
The TCM commands maximum line pressure.
The TCM enables Torque management.
The TCM inhibits TAP Up/Down function.
The TCM inhibits Manual Up/Down shift with the shift selector.
The TCM limits the transmission to Reverse gear, 1st gear, and 3rd gear.

P2730

DTC P2730 is a Type A DTC.
The transmission defaults to 5th gear or reverse gear.
The TCM forces TCC OFF.
The TCM freezes transmission adaptive functions.
The TCM commands maximum line pressure.
The TCM enables Torque management.
The TCM inhibits TAP Up/Down function.
The TCM turns OFF the high side driver.
The TCM inhibits Manual Up/Down shift with the shift selector.
The TCM limits the transmission to Reverse gear, 1st gear, and 3rd gear.