Cruise control is a speed control system that maintains a desired vehicle speed under normal driving conditions. However, steep grades up or down may cause variations in the selected speeds. The cruise control system has the capability to CRUISE, COAST, RESUME SPEED, ACCELERATE, and TAP-UP or TAP-DOWN.

The main parts of the cruise control system are the Throttle Actuator Control (TAC) Module, Powertrain Control Module (PCM), cruise control function switches, cruise control brake switch, stoplamp switch, and clutch switch. The TAC module electronically controls the throttle operation under all driving conditions using inputs from the throttle position sensors, cruise control function switches, and the PCM. Cruise control related inputs to the TAC module or the PCM, other than the cruise control function switches, are likely to affect the operation of other vehicle systems. When diagnosing a cruise control malfunction, determine if any DTCs which may affect cruise control operation are stored in the PCM. Refer to Diagnostic Trouble Code (DTC) List/Type . Cruise control related inputs may be viewed with a scan tool through the PCM. Refer to Scan Tool Data List .

The Driver Information Center (DIC) will display cruise control commands when they are activated such as CRUISE SET and the selected speed, the selected speed when resumed, taped-up, or taped-down, and CRUISE DISENGAGED. The cruise control will not engage at speeds below 25 mph (40 km/h) and will automatically disengage during a traction control event. The PCM will not allow the cruise control to engage until both brake switches and the clutch switch, if equipped, have been seen since the beginning of the ignition cycle.