Contents Wiring diagrams Section: Automatic Trans All sections

Shift Interlock System: Overview Chevrolet Silverado Classic 2500 HD

Automatic Trans 3 illustrations ~200 words

Scheme 203

Scheme 203: Shift Lock Control Wiring Schematics

Scheme 204

Scheme 204: Shift Lock Control Component Views
CalloutComponent Name
1A/T Shift Lock Control Actuator
2Steering Column

Scheme 205

Scheme 205: A/T Shift Lock Control Solenoid
Connector Part Information OEM: 12052832 Service: 12101825 Description: 2 Way F Metri-Pack 150 Series (BK)
Terminal Part Information Terminal/Tray: 12064971/5 Core/Insulation Crimp: E/C Release Tool/Test Probe: 12094429/J-35616-2A (GY)

A/T Shift Lock Control Solenoid Connector Parts Information

PinWire ColorCircuit No.Function
AD-GN/WH1135A/T Shift Lock Control Solenoid Supply Voltage
BBK1050Ground

A/T Shift Lock Control Solenoid Connector Terminal identification

Circuit/System Description

With the ignition in the ON position and the shift lever is in PARK, battery positive voltage is supplied from the body control module (BCM) to the automatic transmission shift lock control solenoid through the normally-closed automatic transmission shift lock control switch. When the transmission control module (TCM) indicates the shift lever is in the PARK position, the engine control module (ECM)/powertrain control module (PCM) sends a class 2 serial data message to the BCM indicating the transmission is in the PARK position. This allows current to flow through the switch to the automatic transmission shift lock control solenoid. Since the automatic transmission shift lock control solenoid is permanently grounded, the shift lock control solenoid energizes, locking the shift linkage in the PARK position. When the driver presses the brake pedal, the contacts in the automatic transmission shift lock control switch open, causing the automatic transmission shift lock control solenoid to de-energize, unlocking the shift lever from the PARK position.