DETROIT (WWJ) – General Motors is recalling some 2012 Chevrolet Impala and Buick LaCrosse models to fix safety problems.

The recall includes approximately 10,344 2012 model Impalas manufactured from April through July of 2011. GM says the upper power steering  hose may have been misrouted so that it can come in close proximity and contact the catalytic converter.

With the Impala’s engine running, heat from the catalytic converter may melt the power steering hose. The power steering fluid could flow onto the catalytic converter, causing an engine compartment fire to occur.

The recall also includes approximately 4,077 2012 model LaCrosses manufactures from June through July of 2011. GM says the vehicles fail to conform to the requirements of Federal Motor Vehicle Safety Standard No. 126, “Electronic Stability Control Systems (ESC).”

The LaCrosse’s stabilitrack system has an incorrect calibration that may cause the system to not properly detect if a sensor were to malfunction, causing the warning light to not illuminate. A malfunctioning sensor may cause the ESC to falsely activate, resulting in sudden changes in vehicle handling and deceleration, which may cause loss of control and could result in a crash without warning.

Although no accidents have been reported as a result of these issues, GM is taking immediate action to ratify the problems.

GM dealers will inspect Impalas to ensure the power steering hose is routed correctly and make the necessary repairs free of charge. Owners may contact Chevrolet for more details at 800-630-2438.

GM dealers will also inspect LaCrosses and reprogram the electronic break control module free of charge. Owners may contact Buick at 866-608-8080.

  1. A Michigan Engineer says:

    Vehicle Dynamics mini lesson on ESC:

    Oversteer occurs when vehicle yaw angular velocity exceeds the kinematics yaw angular velocity for a specific radius of curvature. The brakes are applied to compensate this angular velocity difference by applying a torque to the vehicle system. The braking obviously changes the vehicle’s speed with deceleration and affects the vehicle trajectory and radius of curvature the driver intends to follow.

    Control theory is great when it works but can be a source of problems when it doesn’t, witness Toyota’s guide by wire accelerator system. ESC is intended to override the “controller” behind the wheel

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