Cruise Control Inhibited

WARNING: This page is about a different car, the 2010 Pontiac G5 and 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

The engine control module (ECM) inhibits the cruise control operation when any of the following conditions exist:

The ECM has not detected a brake pedal activation from the body control module (BCM).
A cruise control related DTC has been set.
The vehicle speed is less than 40.2 km/h (25 mph).
The vehicle is in PARK, REVERSE, NEUTRAL, or 1st gear.
The engine RPM is too low.
The engine RPM is too high, with fuel cut off.
The vehicle speed is too high, with fuel cut off.
The system voltage is not between 9-16 volts.
The Antilock Brake System/Traction Control System is active for more than 2 seconds.