Circuit Description
WARNING: This page is about a different car, the 2004 Chevrolet Monte Carlo and 2004 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
The PCM removes the ground from the cruise control inhibit signal circuit when it determines that conditions exist for which cruise control should not be enabled. The PCM also monitors the voltage on this circuit in order to determine if a fault exists.