P2763 or P2764

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Cadillac Escalade EXT. However, it is still accessible from the selected car via links, so may be relevant.

DTCs P2763 and P2764 are Type A DTCs.
The TCM inhibits TCC.
The TCM commands maximum line pressure.
The TCM freezes transmission adaptive functions.
The TCM forces High Side Driver 1 and 2 OFF.