• Fixes to help ensure successful vehicle software updates • Fixes to help protect battery life •...
Chevrolet technical service bulletin 661.40 for 2024-2025 Chevrolet Silverado EV and 2024-2025 GMC Sierra EV.
- Bulletin number
- 661.40 (661.40)
- Component
- Unknown or other
- Summary
- • Fixes to help ensure successful vehicle software updates • Fixes to help protect battery life • Improvements to provide more accurate speed limit detection on the driver’s display • Improvements to the availability of driver assistance features and fewer notifications or warnings • Fixes to help ensure driver assistance features remain functional when the windshield freezes
Vehicles covered
- Chevrolet Silverado EV 2024-2025 20242025
- GMC Sierra EV 2024-2025 20242025
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