GM Service Manual Online
For 1990-2009 cars only
Table 1: Body Control Module (BCM)
Table 2: Electronic Brake Control Module (EBCM)
Table 3: Instrument Panel Cluster (IPC)

Body Control Module (BCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition is ON, engine OFF, and vehicle is stationary

Park Brake Switch

BCM Data

On/Off

Off

Brake Fluid Level Switch

BCM Data

On/Off

Off

Electronic Brake Control Module (EBCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition is ON, engine OFF, and vehicle is stationary

Brake Fluid Level

ABS Data

OK/Low

OK

Instrument Panel Cluster (IPC)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition is ON, engine OFF, and vehicle is stationary

Brake Lamp

Data Display

On/Off

Off