GM Service Manual Online
For 1990-2009 cars only

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition On, Engine Off

DRL Relay

Lamp Status

On/Off

Off

DRL Relay Feedback

Lamp Status

Active/Inactive

Inactive

Park Lamp Input

Lamp Status

On/Off

Off

Low Beam Feedback

Lamp Status

Volts

12.00 Volts

High Beam Feedback

Lamp Status

Volts

12.00 Volts

Front Fog Lamp Switch

Lamp Status

On/Off

Off

Front Fog Lamp Relay

Lamp Status

On/Off

Off

Fog Lamp Relay Feedback

Lamp Status

Active/Inactive

Inactive

Interior Dim Pot

Lamp Status

Volts

0.00 Volts

Interior Lamp Output

Lamp Status

On/Off

Off

Interior Lamp Feedback

Lamp Status

Active/Inactive

Inactive

Driver Door Ajar Switch

Lamp Status

On/Off

Off

Passenger Door Ajar Switch

Lamp Status

On/Off

Off

Inadvert. Power Output

Lamp Status

On/Off

On

Inadvert. Power Feedback

Lamp Status

Active/Inactive

Active

Cargo Lamp On

Lamp Status

On/Off

Off