Soft Shifts
WARNING: This page is about a different car, the 2007 GMC Yukon XL and 2007 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.
Soft Shifts
| Checks | Cause |
|---|---|
| Line Pressure | Too low |
| Pressure Control Solenoid Valve (320) |
|
| PCM | Failed |
| Accumulator Piston |
|
| Accumulator Spring | Incorrect |
| Calibration PROM | Incorrect |
| Check the PCM for current DTCs. | |
| Shift Solenoids | Leaking |
| 4th Accumulator Piston Pin Retainer Ring | Missing |