GM Service Manual Online
For 1990-2009 cars only

Scan Tool Parameter

Data Display

Units Displayed

Typical Data Value

Operating Conditions: Ignition in the ON position. Bright light applied to the DRL ambient light sensor. Park brake not set. Headlamp switch in the OFF position. I/P Lamp switch in the OFF position. Fog lamp switch in the OFF position.

Backlight Dimming

Normal Mode

%

Varies

Dimmed Illumination

Status Information

%

Varies

Dome Lamp Switch

Input/Output

Door/Off/On

Door/Off/On

Headlamps

Normal Mode

Off/On

Off/On

Interior Lamp output

Input/Output

Off/On

Off

Instrument Panel Dimmer Switch

Input/Output

Down/Normal/Up

Normal

Instrument Panel Dimmer

Status Information

Down/Normal/Up

Normal

Parklamp Switch

Status Information

Off/On

Off