TSB N25-250020 — Chevrolet and GMC Software update
N25-250020 is a software update on file with NHTSA for 3 Chevrolet and GMC models, 2025–2026 model years, filed and re-filed as 2 documents. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. •Improves how center display adjusts to lighting changes. •Improved warnings when a key is missing. •Improvements to automatic low beam headlamp logic. •Smoother dimming and transitions from day to night. •Updates to reduce erroneous engine alerts. •Improvements to accuracy of…
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Worth checking your VIN against. N25-250020 is filed as a software update, which unlike an ordinary bulletin can mean free or reimbursed work when a vehicle qualifies. Ask a dealer using the document ID below, and check open recalls separately at nhtsa.gov/recalls.
Vehicles and model years N25-250020 names
| Vehicle | Model years |
|---|---|
| Chevrolet Colorado | 2025 |
| Chevrolet Silverado 2500 | 2026 |
| GMC Canyon | 2025 |
Every document filed under N25-250020
Manufacturers re-issue a bulletin as the repair changes, and file separate copies for technicians and for owners. All of them carry the same number.
| Document ID | Filed | Type |
|---|---|---|
| N25-250020 | June 17, 2025 | Software update |
| N25-250020 | June 2, 2025 | Software update |
Questions buyers ask
What is TSB N25-250020?
N25-250020 is a software update filed with NHTSA by Chevrolet and GMC, covering 3 Chevrolet and GMC models across the 2025–2026 model years. NHTSA's summary reads: •Improves how center display adjusts to lighting changes. •Improved warnings when a key is missing. •Improvements to automatic low beam headlamp logic. •Smoother dimming and transitions from day to night. •Updates to reduce erroneous engine alerts. •Improvements to accuracy of…
Which vehicles does N25-250020 cover?
NHTSA's file names Chevrolet Colorado (2025); Chevrolet Silverado 2500 (2026); GMC Canyon (2025). A bulletin number can be re-issued against more vehicles later, so check the model-year list on this page against your own.
Is TSB N25-250020 a recall, and is the repair free?
N25-250020 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.
How do I get the full text of N25-250020?
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 N25-250020, its date, and NHTSA's own summary from the public file.
Every number on this page is a count of records in the federal complaint, recall, and investigation files published by NHTSA's Office of Defects Investigation. This page lists only what NHTSA's manufacturer-communications file records under N25-250020. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.