Condition No. 2 For Setting DTC P1810

WARNING: This page is about a different car, the 2002 GMC Cab & Chassis Sierra and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The engine speed is less than 50 RPM for 0.3 second; then 50-725 RPM for 0.025 second; then the engine speed is greater than 725 RPM.
The vehicle speed is less than 5 MPH.
The PCM detects the gear range "D1", "D2" or Reverse before and after start up.
All conditions are met for 7 seconds.