High Line Pressure
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
High Line Pressure
| Checks | Cause |
|---|---|
| Pressure Regulator Valve (231) | Valve is stuck at high torque signal due to an undersized bore or sediment. |
| Reverse Boost Valve (228) | Valve is stuck at high torque signal due to an undersized bore or sediment. |
| Retainer Pin (211) | Pin is broken |
| Orificed Plug (210) | Plug is blocked |
| Pressure Control Solenoid Valve (320) |
|
| PCM | Loose connector |
| Check the PCM for current DTCs. | |