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March 14, 2026 Over-the-air update

• Fixes to help ensure proper functionality for heating and cooling features

GMC technical service bulletin 653.21 for 2024-2025 GMC Acadia, 2024-2025 Chevrolet Traverse and 2024-2025 Buick Enclave.

Bulletin number
653.21 (653.21)
Component
Unknown or other
Summary
• Fixes to help ensure proper functionality for heating and cooling features. • Improvements to night mode lights for shifting gears. • Fixes for Daytime Running Lamps turning on when set to Off. • Fixes to help prevent erroneous missing key messages on driver display. • Fixes for accuracy of low tire pressure alert. • Fixes for speed threshold for pedestrian alerts.

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