GM Service Manual Online
For 1990-2009 cars only

Powertrain Control Module

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