Chevrolet Silverado 1500 2024–2025 — technical service bulletin
Bulletin N25-250520 · NHTSA communication 11018709 · issued May 5, 2025
Technical service bulletin
communication type
Unknown OR Other
component
2024–2025
model years
4
vehicle entries
Official summary
Software Update for your 25MY Chevrolet Silverado / GMC Sierra: • Enables the active cabin ventilation feature. • When windows are remotely lowered using the key fob, the HVAC blower will turn on. During the update process, your radio may stay on up to 5 minutes after you exit the vehicle. This is expected behavior when an update package is onboard the vehicle. Do not service your vehicle during installation.
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.