Conditions for Setting the DTC: P1762
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 TCM detects the Tow/Haul Mode information is not received or the rolling counter expected value is not met 5 times within a 10 second period.