P0742 Condition 2 High Acceleration Condition
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.
The TCC is commanded off and the output shaft acceleration is greater than 100 RPM/second and the expected converter slip is not observed for 5 seconds.