• Fixes to help ensure start reliability and prevent battery drain • Improved charging performance and...
Chevrolet technical service bulletin 663.40 for 2026 Chevrolet Silverado EV and 2026 GMC Sierra EV.
- Bulletin number
- 663.40 (663.40)
- Component
- Unknown or other
- Summary
- • Fixes to help ensure start reliability and prevent battery drain • Improved charging performance and messages
Vehicles covered
- Chevrolet Silverado EV 2026 2026
- GMC Sierra EV 2026 2026
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