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/Vehicle in PARK/Headlamps in AUTO

Auto Learn Timer

Security Data

Seconds

0-600

Battery Voltage

Data

Volts

Varies

Content Theft Lamp

Security Data

ON/OFF

OFF

Content Theft State

Security Data

ON/OFF

OFF

Door Unlock Switch

Inputs

ACTIVE/INACTIVE

ACTIVE

Driver Door Ajar Switch

Inputs

ACTIVE/INACTIVE

ACTIVE (door open)

Ignition 1

Inputs

ACTIVE/INACTIVE

ACTIVE

Ignition 3

Inputs

ACTIVE/INACTIVE

ACTIVE

Module Part Number

ID Information

Numeric

Varies

Passlock Code

Security Data

Open/Short/Tamper/Numeric

Valid Code 1-10

Passlock Data Voltage

Security Data

Volts

0.86-5 Volts

Passlock Ignition Cycles

Security Data

Cycles

Varies

Passlock Power

Security Data

On/Off

On

Passlock State

Security Data

Ignition Off/Tamper/Fail Enable/Fail Enable Dec/Seedkey Lrn Pend/Seedkey Learn/Auto Learn Pend/Learn Passlock/Monitor Passlock/Normal Decision/Auto Learn

Monitor Passlock

Security Calibration Number

ID Information

Numeric

Varies

Security Lamp State

Security Data

ON/OFF/FLASHING

OFF

Security Suffix

ID Information

Two Letters

Varies

Seed and Key Timer

Security Data

Seconds

0 Seconds

Tamper Timer

Security Data

Seconds

0-600

Powertrain Control Module (PCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

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

PCM/VCM in VTD Fail Enable

Engine Data 1

Yes/No

No

VTD Auto Learn Timer

Engine Data 1

Active/Inactive

Inactive

VTD Fuel Disable

Engine Data 1

Active/Inactive

Inactive

VTD Fuel Disable Until Ign. OFF

Engine Data 1

Yes/No

No