TSB 25-NA-100 — Buick and Chevrolet Service bulletin
25-NA-100 is a service bulletin on file with NHTSA for 6 Buick and Chevrolet models, 2017–2018 model years. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. This warranty administration bulletin provides policy information on vehicles outside of a California Emissions State who move to and register their vehicle in a California Emission State may be entitled to the 7 year, 70,000-mile Emission Select State Component Limited Warranty.
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Vehicles and model years 25-NA-100 names
| Vehicle | Model years |
|---|---|
| Buick Enclave | 2018 |
| Chevrolet Cruze | 2017, 2018 |
| Chevrolet Malibu | 2017, 2018 |
| Chevrolet Sonic | 2017, 2018 |
| Chevrolet Traverse | 2017, 2018 |
| Chevrolet Trax | 2017, 2018 |
Every document filed under 25-NA-100
| Document ID | Filed | Type |
|---|---|---|
| 25-NA-100 | April 18, 2025 | Service bulletin |
What 25-NA-100 covers
Engine — the component vocabulary NHTSA files this communication under.
Questions buyers ask
What is TSB 25-NA-100?
25-NA-100 is a service bulletin filed with NHTSA by Buick and Chevrolet, covering 6 Buick and Chevrolet models across the 2017–2018 model years. NHTSA's summary reads: This warranty administration bulletin provides policy information on vehicles outside of a California Emissions State who move to and register their vehicle in a California Emission State may be entitled to the 7 year, 70,000-mile Emission Select State Component Limited Warranty.
Which vehicles does 25-NA-100 cover?
NHTSA's file names Buick Enclave (2018); Chevrolet Cruze (2017–2018); Chevrolet Malibu (2017–2018); Chevrolet Sonic (2017–2018); Chevrolet Traverse (2017–2018); Chevrolet Trax (2017–2018). 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 25-NA-100 a recall, and is the repair free?
No. 25-NA-100 is repair guidance the manufacturer sent its dealers, not a safety defect finding. You pay for the work unless the vehicle is still under warranty. Recall repairs, by contrast, are always free.
How do I get the full text of 25-NA-100?
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 25-NA-100, 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 25-NA-100. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.