NHTSA Complaint #11617954 — 2018 CHEVROLET TRAVERSE

Incident Description: On 10/2/2024, I discovered a critical failure in the rear suspension of my 2018 Chevrolet Traverse. The rear left control arm had completely rusted through and detached from the vehicle frame. This occurred unexpectedly while my family was backing the vehicle into the driveway from my garage. Had this failure happened while driving, it could have resulted in a catastrophic loss of control, leading to a severe accident with potential for serious injury or fatality to my family and others. This incident raises serious concerns about the safety of 2018 Chevrolet Traverse vehicles. The premature and sudden failure of a critical suspension component due to rust suggests a potential defect in the materials, anti-corrosion treatment, or design of the control arm. This could pose a significant safety risk to all owners of this vehicle model. I have taken detailed photographs of the failed control arm and the affected area of the vehicle frame, clearly showing the extent of the rust and corrosion. General Motors has issued a safety recall (N212346640) for certain vehicles due to a defect in the rear suspension toe links. These vehicles may have received improper electrocoating corrosion protection, making the toe links susceptible to premature rust and fracture. This could lead to a loss of vehicle control and increase the risk of a crash. The similarity of this recall to the failure I experienced with the rear left control arm onmy 2018 Chevrolet Traverse suggests a potential pattern of corrosion-related suspension component failures in General Motors vehicles.   This recall demonstrates that General Motors has acknowledged and addressed similar corrosion-related defects in other vehicles. It supports my concern that the control arm failure on my Traverse may also stem from a manufacturing defect and warrants a thorough investigation by the NHTSA.