Actions Taken When the DTC Sets

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.

DTC P2728 = Type C DTC - Additional actions taken:

Freeze current adapt values - 2-6 Clutch

DTC P2729, P2730 = Type A DTC - Additional actions taken:

Grade braking = Disabled
High Side Driver = Disabled
Line Pressure Command = Maximum
Manual Shift Control = Disabled
Mode Switch = Disabled
Neutral Idle Mode = Disabled
{ P2729 }{Output Speed Sensor = Greater than 1, 350 RPM}Transmission = Neutral
{ P2729 }{Output Speed Sensor = Less than 1, 350 RPM}Transmission = 2nd Gear
Powertrain braking = Disabled
TCC Control = Disabled
Tow/Haul Mode = Disabled
Transmission Adaptive Pressure Control = Freeze current adapt values