• Improvements to active cabin ventilation • Additional protection for the health of your battery •...
Chevrolet technical service bulletin 662.20 for 2026 Chevrolet Silverado EV and 2026 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 • Improved vehicle performance when driving in Reverse on slippery surfaces • Better One-Pedal Driving performance • Improved accuracy for driver display messages • This update contains a required software change to help improve the overall software update and diagnostics process
Vehicles covered
- Chevrolet Silverado EV 2026 2026
- GMC Sierra EV 2026 2026
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