GMC Sierra 2500 2024 — technical service bulletin
Bulletin N25-250403 · NHTSA communication 11021067 · issued Jul 22, 2025
Technical service bulletin
communication type
Unknown / Other
component
2024
model years
1
vehicle entries
Official summary
• Improves Check Engine Light accuracy. • Improves behavior of aero shutter system in freezing temperatures. 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.