Automatic Transmission Control Module problems of the 2008 Buick Lucerne

The contact owns a 2008 Buick Lucerne. The contact stated that while driving at approximately 15 mph, the vehicle lost motive power. The low oil pressure warning light was illuminated, and the message "add engine oil" was displayed. The vehicle was towed to an independent mechanic, where it was diagnosed that the catalytic converter was clogged and needed to be replaced. The vehicle was repaired, however, the failure recurred immediately. The vehicle was then towed to an independent mechanic, where it was diagnosed that the tcm had failed and needed to be replaced. The vehicle was repaired; however, the failure recurred approximately a week later. The vehicle was then towed to the same independent mechanic, where it was determined that the coil pack needed to be replaced. The vehicle was repaired; however, the failure persisted. The vehicle was towed to the residence. The contact stated that upon starting the vehicle, the vehicle experienced a rough idle and was undrivable. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 138,500.