Buick Enclave 2025 — technical service bulletin
Bulletin 653.20 · NHTSA communication 11024651 · issued Oct 13, 2025
Technical service bulletin
communication type
Unknown OR Other
component
2025
model years
3
vehicle entries
Official summary
• Improves how center display adjusts to lighting changes. • Improved warnings when a key is missing. • Better tuning for interior lighting in Stealth mode. • Improvements to automatic low beam headlamp logic. • Smoother dimming and transitions from day to night. • Improves Check Engine Light accuracy. • Improves behavior of aero shutter system in freezing temperatures. • Fixes to help prevent erroneous collision calls. • Fixes to address issues with OnStar stolen vehicle responses. • Improvements to performance of software updates and connectivity. • Fixes to help prevent battery drain. • Fix
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.