Component Testing
WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. 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 |