Action Taken When the DTC Sets
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
P0776
- DTC P0776 is a Type A DTC.
- The TCM commands maximum line pressure.
- The TCM inhibits Tow/Haul mode.
- The TCM freezes transmission adaptive functions.
- The TCM inhibits TAP Up/Down function.
- The TCM inhibits Manual Up/Down Shift with the shift selector.
- The TCM limits the transmission to Reverse gear, 2nd gear, and 4th gear operation. Once 2nd gear is obtained, the transmission will stay in 2nd gear.
P0777
- DTC P0777 is a Type A DTC.
- The TCM commands maximum line pressure.
- The TCM inhibits Tow/Haul mode.
- The TCM freezes transmission adaptive functions.
- The TCM inhibits TAP Up/Down function.
- The TCM inhibits Manual Up/Down Shift with the shift selector.
- The TCM limits the transmission to Reverse gear and 3rd gear operation.