Action Taken When the DTC Sets

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. 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.

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.