In the affected vehicles, software in the electronic climate control unit may disable the ability to adjust the heating, ventilation or air conditioning. If the condition affects the defrost system when it is required, it may decrease the driver’s visibility and increase the likelihood of a crash.
The recall is expected to begin this month. Dealers will reprogram the software in the climate control system to correct the problem. Owners can call GM at 866-608-8080 or NHTSA’s vehicle safety hotline at 888-327-4236.