Circuit/System Description
WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
The engine control module (ECM) or powertrain control module (PCM), monitors various parameters and will not allow traction control system (TCS) operation if any parameter falls outside a specified range.