TECHNICAL SERVICE BULLETIN: SERVICE ACTION: AMP LOGIC IMPROVEMENT FOR NOISE/NO SOUND ISSUES (SA521) - This Service Action (SA521), along with SA520, supersedes SA494A, which is now closed. Please follow the updated information in this bulletin. This bulletin provides the procedure to update the 'AMP' software logic to improve noise and mute prevention logic on some 2022-2023MY EV6 (CV) vehicles produced from January 7, 2022 through October 19, 2022.
