OnStar Over the Air Update for TTY / TDD Operation and Continuous Improvement Changes – 2019-2021 Buick Cadillac Chevrolet GMC
NHTSA ID Number: 10183198 Manufacturer Communication Number: 20NA196 Summary This service bulletin provides information and a service procedure for dealers/technicians on OnStar Over the Air Update for TTY / TDD Operation and Continuous Improvement Changes. SEOCONTENT-START Copyright 2020 General Motors LLC. All Rights Reserved. Service Bulletin Bulletin No.: 20-NA-196 Date: November, 2020 TECHNICAL Subject: … Read more