GM Service Manual Online
For 1990-2009 cars only

Body Control Module (BCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON/Engine OFF

Battery Voltage

Data

Volts

12.6 Volts

Crank

Inputs

Yes/No

No

Software Part Number

Module Information

Numeric

Varies

Instrument Panel Cluster (IPC)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON/Engine OFF

Cluster Part Number

Module Information

Numeric

Varies

Crank

Data

Yes/No

No

Julian Date of Build

Module Information

Numeric

Varies

Prom ID

Module Information

Alpha-Numeric

Varies

Software Release, Day

Module Information

Numeric

Varies

Software Release, Month

Module Information

Numeric

Varies

Software Release, Year

Module Information

Numeric

Varies

Software Version

Module Information

Numeric

Varies

Volt Lamp

Inputs

On/Off

Off

Powertrain Control Module (PCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON/Engine OFF

Commanded GEN

IPC Data

On/Off

Off

Crank Request

Engine Data 1

Yes/No

No

Generator PWM

IPC Data

%

0%

Starter Enable Relay

Output Driver Data

Yes/No

No

Starter Relay Status

Engine Data 1

On/Off

Off