Action Taken When the DTC Sets

WARNING: This page is about a different car, the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban 3500 HD, and 2018 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.

P0751

DTC P0751 is a Type B DTC.
TCM inhibits 1st gear.
TCM inhibits neutral idle.

P0752

DTC P0752 is a Type A DTC.
TCM freezes transmission adaptive functions.
TCM commands maximum line pressure.
TCM inhibits Tap Up/Down function.
TCM inhibits manual shifting of forward gears.
TCM commands second gear if output is less than 1, 350 RPM, or neutral if output speed is 1, 350 RPM or greater.
TCM inhibits neutral idle.