• Improvements to active cabin ventilation • Additional protection for the health of your battery •...
Chevrolet technical service bulletin 662.20 for 2025 Chevrolet Silverado 2500 and 2025 GMC Sierra 2500.
- Bulletin number
- 662.20 (662.20)
- Component
- Unknown or other
- Summary
- • Improvements to active cabin ventilation • Additional protection for the health of your battery • Improvements to the software update system • Fixes to help ensure proper functionality for heating and cooling features. • Improvements to night mode lights for shifting gears. • Fixes for Daytime Running Lamps turning on when set to Off. • Fixes to help prevent erroneous missing key messages on driver display. • Fixes for accuracy of low tire pressure alert. • Fixes for speed threshold for pedestrian alerts. • Improvements to help reduce check engine light activation and emissions system messages. • Improves behavior of aero shutter system in freezing temperatures • Improvements to reliability when extending the running boards on your vehicle.
Vehicles covered
- Chevrolet Silverado 2500 2025 2025
- GMC Sierra 2500 2025 2025
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