GM Service Manual Online
For 1990-2009 cars only
Cruise Active: Displays Disengaged or Engaged. The status of the cruise engaged signal. The cruise control module grounds the circuit when cruise control is on.

Cruise Inhibit Signal Command: Displays ON or OFF. Indicates if the PCM is commanding the cruise control module to inhibit cruise control operation. If the PCM determines that any of the cruise control inhibit conditions are present , the PCM will disengage the cruise control. The PCM accomplishes this by removing the ground from the cruise control inhibit circuit.

Cruise Inhibit Reason: The scan tool displays the last 6 cruise control disengages in order from 1 to 6. There are 20 possible causes for the cruise control to disengage.