TSB 18-NA-306 — Chevrolet Service bulletin
18-NA-306 is a service bulletin on file with NHTSA for the Chevrolet Cobalt, 2011–2012 model years. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. This Warranty Administration service bulletin provides information for dealers/Service advisors on when and how to submit a Pre-Repair Authorization (PRA).
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Vehicles and model years 18-NA-306 names
| Vehicle | Model years |
|---|---|
| Chevrolet Cobalt | 2011, 2012 |
Every document filed under 18-NA-306
| Document ID | Filed | Type |
|---|---|---|
| 18-NA-306 | September 1, 2023 | Service bulletin |
Questions buyers ask
What is TSB 18-NA-306?
18-NA-306 is a service bulletin filed with NHTSA by Chevrolet, covering the Chevrolet Cobalt across the 2011–2012 model years. NHTSA's summary reads: This Warranty Administration service bulletin provides information for dealers/Service advisors on when and how to submit a Pre-Repair Authorization (PRA).
Which vehicles does 18-NA-306 cover?
NHTSA's file names Chevrolet Cobalt (2011–2012). 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 18-NA-306 a recall, and is the repair free?
No. 18-NA-306 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 18-NA-306?
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 18-NA-306, 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 18-NA-306. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.