Conditions for Running the DTC: P0877

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.

Engine running.
Battery voltage is greater than 9.0 V and less than 18 V.
Transmission fluid temperature is above 0°C (32°F).
TFP switch 4 is low, indicating the manual selector valve is in the reverse.
DTCs P0708 and P0878 are not active.