GM Service Manual Online
For 1990-2009 cars only
Table 1: Instrument Panel Cluster (IPC)
Table 2: Body Control Module (BCM)

Instrument Panel Cluster (IPC)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON, engine OFF, and park brake released.

Park Brake Switch

--

On/Off

Off

Body Control Module (BCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON, engine OFF, gear shift lever in Park, and park brake released.

Park Brake Solenoid A Command

--

On/Off

Off

Park Brake Solenoid B Command

--

On/Off

Off