GM Service Manual Online
For 1990-2009 cars only

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

DEFINITION: Engine is at idle, upper radiator hose is hot, closed throttle, gear is in Park or Neutral, and accessories are OFF.

2WD High Indicator Light

Transfer Case Data

On/Off

On

4WD High Indicator Light

Transfer Case Data

On/Off

Off

4WD Low Active

Transfer Case Data

Yes/No

No

4WD Low Indicator Light

Transfer Case Data

On/Off

Off

ATC Application

Transfer Case Data

Application

Varies

ATC Slip Speed

Transfer Case Data

RPM

0

Auto 4WD Indicator Light

Transfer Case Data

On/Off

On

Battery Voltage

Transfer Case Data

Volts

Battery Voltage

Current Slip Adapts

Transfer Case Data

Counts

Varies

Encoder Gear Position

Transfer Case Data

2WD/4WD High/4WD Low/Auto 4WD/Neutral

Varies

Encoder Return Voltage

Transfer Case Data

Volts

0-5 V

Encoder Supply Voltage

Transfer Case Data

Volts

0-5 V

Front Axle Requested

Transfer Case Data

Yes/No

No

Front Axle Switch

Transfer Case Data

Locked/Unlocked

Unlocked

Front Propshaft Speed

Transfer Case Data

RPM

0

Ign. Cycles Since Last Current DTC

Transfer Case Data

Number

Varies

Mode Switch Return Voltage

Transfer Case Data

Volts

0-5 V

Mode Switch Selected

Transfer Case Data

2WD/4WD High/4WD Low/Auto 4WD/Neutral

Varies

Neutral Indicator Light

Transfer Case Data

On/Off

Off

Rear Propshaft Speed

Transfer Case Data

RPM

0

Service 4WD Lamp

Transfer Case Data

On/Off

Off

Slip Adapt PWM

Transfer Case Data

%DC

0

Total Slippage

Transfer Case Data

RPM

0

Transfer Case Lock

Transfer Case Data

Enabled/Disabled

Disabled