GM Service Manual Online
For 1990-2009 cars only

Powertrain Control Module (PCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON/Engine Idling at Normal Operating Temperature/Vehicle is in Park or Neutral/Cruise On/Off Switch is Turned Off

Cruise Control Active

Cruise Control Data

Yes/No

No

Cruise Disengage (1 - 8) History

Cruise Control Data

Last reason for cruise control disengagement

Varies

Cruise On/Off Switch

Cruise Control Data

On/Off

Off

Cruise Release Brake Pedal Switch

Cruise Control Data

Applied/Released

Released

Cruise Resume/Accel. Switch

Cruise Control Data

On/Off

Off

Cruise Set/Coast Switch

Cruise Control Data

On/Off

Off

Engine Speed

Cruise Control Data

RPM

Varies

Ignition 1 Signal

Cruise Control Data

Volts

9 to 18

Reduced Engine Power

Cruise Control Data

Active/Inactive

Inactive

Stop Lamp Pedal Switch

Cruise Control Data

Applied/Released

Released

TAC/PCM Communication Signal

Cruise Control Data

OK/Fault

OK

Traction Control Signal

Cruise Control Data

Active/Inactive

Inactive

Vehicle Speed Sensor

Cruise Control Data

km/h (mph)

0 km/h (0 mph)