• Improvements to the performance of vehicle software updates
Chevrolet technical service bulletin 661.21 for 2025 Chevrolet Tahoe, 2025 GMC Yukon and 2025 GMC Yukon XL and others.
- Bulletin number
- 661.21 (661.21)
- Component
- Unknown or other
- Summary
- • Improvements to the performance of vehicle software updates. • Fixes to help prevent loss of functionality for connectivity features, including maps and Wi-Fi. • Fixes to help prevent erroneous emergency calls from vehicle. • Fixes for deleting digital keys. • Fixes to help ensure proper functionality for mobile app features. • Improvements to the performance of Super Cruise.
Vehicles covered
- Chevrolet Tahoe 2025 2025
- GMC Yukon 2025 2025
- GMC Yukon XL 2025 2025
- Cadillac Escalade 2025 2025
- Chevrolet Suburban 1500 2025 2025
- Cadillac Escalade ESV 2025 2025
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