Conditions for Setting the DTC: P0742

WARNING: This page is about a different car, the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

The following conditions occur 3 times in one ignition cycle:

The TCC slip is between -20 to +40 RPM for 6 seconds.

P0752

The TCM commands 2nd gear and the resulting gear ratio is 2.91:1-3.21:1 for 2.25 seconds.
The TCM commands 3rd gear and the resulting gear ratio is 0.66:1-0.73:1 for 3 seconds.