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简体中文Transmission Flaw Prompts Major GM Recall
General Motors (GM) has issued a recall for over 90,000 vehicles due to a potential transmission issue that could lead to wheel lock-up. The recall, announced by the National Highway Traffic Safety Administration, stems from a problem with the transmission control valves in certain models equipped with 10-speed transmissions.
Affected Vehicle Models
The recall impacts the following models:
- 2020-21 Cadillac CT4
- 2020-21 Cadillac CT5
- 2019-20 Cadillac CT6
- 2020-22 Chevrolet Camaro
According to the NHTSA, approximately 1% of the recalled vehicles are estimated to have the defect.
The Root Cause: Valve Wear
The core issue lies in the potential for excessive wear of the transmission control valves. This wear can cause a loss of pressure within the valve, leading to harsh shifting and, in rare instances, a momentary wheel lock-up. The NHTSA recall notice emphasizes that this lock-up could increase the risk of a crash.
Timeline of the Investigation
The problem first surfaced in September when a 2021 Cadillac CT5 driver reported front tire lock-up. While GM initially investigated and closed the case due to the short duration of the lock-ups (less than 150 milliseconds) and the absence of reported accidents or injuries, the probe was reopened in November after 115 lock-up reports surfaced, including one accident.
GM’s Response and the Recall Solution
Following the reopened investigation, GM’s Safety Field Action Decision Authority decided to initiate a safety recall on February 27. Affected owners will be notified starting next month and will receive new transmission control software. This software is designed to detect excessive safety valve wear and prevent potential wheel lock-ups.
What Owners Need to Do
Owners of the affected vehicles should look out for recall notifications from General Motors starting next month. It is crucial to schedule an appointment with a certified GM dealer to have the new transmission control software installed. This update will mitigate the risk of wheel lock-up and ensure the safe operation of your vehicle.
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