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The 2020 Chevrolet Corvette and several other General Motors products are confirmed to have an issue with brake sensor contamination in their brake-by-wire system. The Corvette Action Center initially broke the news, and also says the Corvette and others are under a “stop delivery” order because of it. GM confirmed the problem, but did not explicitly confirm the “stop delivery” order to us. In total, the issue applies to the following GM vehicles:
Here’s how GM describes the problem:
“The material used in a sensor connection in the electronic brake booster system on these vehicles may have been contaminated during the material supplier’s production process. Contamination from this material can cause a breakdown in communication between the sensor and the brake booster system under certain conditions. “
In addition to the reported stoppage of deliveries, GM is expected to issue a recall for this issue, but official recall information is not yet available on the National Highway Traffic Safety Administration website.
For context, the Corvette’s cable-by-wire system is significantly different from a traditional brake system. It combines the master cylinder, vacuum booster, vacuum pump, and electronic brake control module in one unit. If there is “a communication breakdown” with the electronics, the electronic brake boost assist could be lost, which in turn would require more force on the brake pedal to stop. The Corvette Action Center noted that GM says a warning light in the instrument cluster will come on if brake boost assist is lost.
When the official recall information is released, we will know more about the right time for a solution. To date, GM has recognized the problem and appears to be taking steps to remedy it.
