OnStar Additional Information
PowertrainReverse (Gen 2/Hybrid) Automatic Transmission Unit
When the gear selector lever is moved to the Reverse (R)position (from the Park position) the normally-low 35R pressurecontrol solenoid is commanded ON and the following changes occur inthe transmission’s hydraulic and electricalsystems:3-5-Reverse Clutch AppliesManual ValveWith the manual valve i ...