TSB N25-250552 — Buick, Chevrolet and GMC Software update

N25-250552 is a software update filed with NHTSA by Buick, Chevrolet and GMC, covering 14 Buick, Chevrolet and GMC models across the 2021–2025 model years. NHTSA's summary reads: • Improvements to OnStar through enhancements for charging, Super Cruise, remote start, and collision notification. • Fixes to address connectivity issues. During the update process, your radio may stay on up to 5 minutes after you exit the vehicle. This is expected behavior…

NHTSA's file names Buick Enclave (2021–2024); Chevrolet Blazer (2021–2025); Chevrolet Bolt EV (2021–2023); Chevrolet Camaro (2021–2024); Chevrolet Equinox (2021–2024); Chevrolet Malibu (2021–2025); Chevrolet Silverado 1500 (2021–2024); Chevrolet Silverado 2500 (2021–2023); Chevrolet Trailblazer (2021–2025); Chevrolet Traverse (2021–2024), and 4 more vehicles listed on this page. A bulletin number can be re-issued against more vehicles later, so check the model-year list on this page against your own.

N25-250552 is filed as a software update, not a recall — but this is the kind of communication that can mean free or reimbursed work if your VIN qualifies. Take the number to a dealer and ask. Recalls are separate and always free; check yours by VIN at nhtsa.gov/recalls.

Take the document ID to a dealer's service desk, or search NHTSA's manufacturer-communications records. This page carries every document ID filed under N25-250552, its date, and NHTSA's own summary from the public file.