Diagnostic Aids: P0872

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

You may have to drive the vehicle in order to experience a condition.
This DTC may indicate that SS3 is mechanically defective.
When DTCs P0762 and P0872 are set in combination, this may indicate an grounded circuit condition on the pressure switch circuit or the shift valve 3 is stuck in the stroked position.