Conditions for Setting the DTC

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

P0751

Commanded gear slip is 400 RPM for 1.1 seconds.
First gear locked is commanded.
The closest gear ratio is 4th gear.

P0752

Gear slip is 400 RPM or greater for 5 seconds.
Commanded gear is 3rd.
Transmission has achieved second gear.