GM Service Manual Online
For 1990-2009 cars only

Powertrain Control Module (LG8)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON/Engine OFF

Commanded GEN

IPC Data

On/Off

Off

Generator Lamp

IPC Data

On/Off

On

Generator Lamp Circuit

Output Driver Data

OK/Fault

OK

Ignition 1

Engine Data 1, IPC Data

Volts

13.0 Volts

VTD Fuel Disable

Engine Data 1

Yes/No

No

Powertrain Control Module (L36)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON/Engine OFF

Commanded GEN

Engine Data 1

On/Off

Off

Generator Lamp

Engine Data 2

On/Off

On

Generator PWM

Engine Data 2

%

0%

Generator Lamp Circuit

Output Driver Data

OK/Fault

OK

Ignition 1

Engine Data 1, Engine Data 2

Volts

13.0 Volts

VTD Fuel Disable

Engine Data 2

Yes/No

No

Powertrain Control Module (L67)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON/Engine OFF

Commanded GEN

Engine Data 1

On/Off

Off

Generator Lamp

Engine Data 2

On/Off

On

Generator PWM

Engine Data 2

%

0%

Generator Lamp Circuit

Output Driver Data

OK/Fault

OK

Ignition 1

Engine Data 1, Engine Data 2

Volts

13.0 Volts

VTD Fuel Disable

Engine Data 2

Yes/NO

No