Component Testing
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.
Operating the transmission in the following condition will verify the PC solenoid or a portion of the hydraulic control circuit is not functioning as it should.
P0776: Clutch Pressure Control (PC) Solenoid 2 - Stuck Off
| Transmission Operating Conditions | Transmission Condition if PC Sol. 2 is Stuck Off |
|---|---|
| Steady State: Gears 3rd or 5th | Neutral |
| Garage Shift: Park/Neutral to Reverse/Drive | Neutral |
| Downshift: from gears 6th, 5th, 4th to 5th or 3rd | Neutral |
P0777: Clutch Pressure Control (PC) Solenoid 2 - Stuck On
| Transmission Operating Conditions | Transmission Condition if PC Sol. 2 is Stuck On |
|---|---|
| Steady State: Gears 1st, 2nd, 4th, or 6th | 3rd or 5th |
| Garage Shift: Park/Neutral to Reverse/Drive | 1st (Engine Braking) |
| Downshift: from gears 4th, 5th, 6th to 3rd or 5th | 3rd or 5th |
| Upshift: from gears 3rd, 5th to 4th, 5th, or 6th | 3rd or 5th |