GM Service Manual Online
For 1990-2009 cars only

Body Control Module (BCM)

Ignition ON/Engine OFF/Vehicle in PARK/Headlamps in AUTO

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Julian Date of Build

Module Information 1

Numeric

Varies

Manufacture Enable Counter

Module Information 1

0-255

0

Module Part Number

Module Information 1

Numeric

Varies

Software Design Suffix

Module Information 1

Two Letters

Varies

Software Part Number

Module Information 1

Numeric

Varies

Retained Accessory Power Calibration Number

Module Information 2

Numeric

Varies

Retained Accessory Power Suffix

Module Information 2

Two Letters

Varies

Battery Voltage

Data

Volts

Varies

Inadvertent Power Timer

Data

Seconds

2400 Seconds

Retained Accessory Power Timer

Data

Seconds

1198 Seconds

Door Handle Switch

Input 1

ACTIVE/INACTIVE

ACTIVE (door open)

Driver Door Jamb Switch

Input 1

ACTIVE/INACTIVE

ACTIVE (door open)

Ignition 1

Input 1

ACTIVE/INACTIVE

ACTIVE

Ignition 3

Input 1

ACTIVE/INACTIVE

ACTIVE

Ignition Power Mode

Input 1

OFF/RUN/CRANK/ UNKNOWN

RUN

Key In Ignition

Input 1

YES/NO

YES

Retained Accessory Power Relay Feedback

Input 1

ON/OFF

ON

Retained Accessory Power Relay

Outputs

ON/OFF

ON