TSB PIC6637B — Chevrolet Service bulletin
PIC6637B is a service bulletin on file with NHTSA for 2 Chevrolet models, 2024–2026 model years. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. This document is a technical bulletin regarding CarPlay issues in certain Buick and Chevrolet models. It details the problem, cause, and current status of the software anomaly affecting CarPlay connectivity.
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Vehicles and model years PIC6637B names
| Vehicle | Model years |
|---|---|
| Chevrolet Trailblazer | 2024, 2025, 2026 |
| Chevrolet Trax | 2024, 2025, 2026 |
Every document filed under PIC6637B
| Document ID | Filed | Type |
|---|---|---|
| PIC6637B | June 10, 2026 | Service bulletin |
Questions buyers ask
What is TSB PIC6637B?
PIC6637B is a service bulletin filed with NHTSA by Chevrolet, covering 2 Chevrolet models across the 2024–2026 model years. NHTSA's summary reads: This document is a technical bulletin regarding CarPlay issues in certain Buick and Chevrolet models. It details the problem, cause, and current status of the software anomaly affecting CarPlay connectivity.
Which vehicles does PIC6637B cover?
NHTSA's file names Chevrolet Trailblazer (2024–2026); Chevrolet Trax (2024–2026). 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 PIC6637B a recall, and is the repair free?
No. PIC6637B 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 PIC6637B?
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 PIC6637B, 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 PIC6637B. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.