• Additional protection for battery health and to help prevent battery drain • Improved charging messaging...
Chevrolet technical service bulletin 662.40 for 2026 Chevrolet Silverado EV and 2026 GMC Sierra EV.
- Bulletin number
- 662.40 (662.40)
- Component
- Unknown or other
- Summary
- • Additional protection for battery health and to help prevent battery drain • Improved charging messaging in the driver display • Improved vehicle diagnostics
Vehicles covered
- Chevrolet Silverado EV 2026 2026
- GMC Sierra EV 2026 2026
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