Shift Lock Control System: Removal & Installation Hummer H2 I

Removal Procedure

1. Remove the console. Refer to «Console Replacement»(ref-187217-S27783040252005083100000) in Instrument Panel, Gauges and Console.
2. Disconnect the Shift Lock Actuator electrical connector (3).
3. Remove the Shift Lock Actuator fasteners and remove Actuator (2).

Installation Procedure

1. Install the Shift Lock Actuator onto the shift selector and install fasteners (2). Tighten: Tighten the shift lock actuator fasteners to 2 N.m (18 lb in).
2. Connect the electrical connector (3).
3. Install the console. Refer to «Console Replacement»(ref-187217-S27783040252005083100000) in Instrument Panel, Gauges and Console.

The automatic transmission shift lock control is a safety device that prevents an inadvertent shift out of PARK when the ignition is ON. The driver must press the brake pedal before moving the shift lever out of the PARK position. The system consists of the following components

1. The automatic transmission shift lock control solenoid.
2. The automatic transmission shift lock control switch.
3. The park/neutral position switch.

With the ignition in the ON position, battery positive voltage is supplied to the park/neutral position switch. When the transmission is in the PARK position the contacts in the park/neutral position switch are closed. This allows current to flow through the switch to the automatic transmission shift lock control switch. The circuit continues through the normally-closed switch to the automatic transmission shift lock control solenoid. The automatic transmission shift lock control solenoid is permanently grounded. This energizes the automatic transmission shift lock control solenoid, 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 release. This allows the shift lever to move from the PARK position.