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July 8, 2026 Over-the-air update

• Improvements to active cabin ventilation • Additional protection for the health of your battery •...

Chevrolet technical service bulletin 662.20 for 2024 Chevrolet Silverado EV and 2024 GMC Sierra EV.

Bulletin number
662.20 (662.20)
Component
Unknown or other
Summary
• Improvements to active cabin ventilation • Additional protection for the health of your battery • Updates to help prevent excessive battery drain and overheating • Improvements to the software update system • This update contains a required software change to help improve the overall software update and diagnostics process

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