TSB PIC6551B — Buick, Cadillac, Chevrolet and GMC Service bulletin
PIC6551B is a service bulletin on file with NHTSA for 21 Buick, Cadillac, Chevrolet and GMC models, 2021–2026 model years. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Vehicles and model years PIC6551B names
| Vehicle | Model years |
|---|---|
| Buick Enclave | 2021, 2022, 2023, 2024, 2025, 2026 |
| Cadillac Escalade | 2021, 2022, 2023 |
| Chevrolet Blazer | 2021, 2022, 2023, 2024, 2025, 2026 |
| Chevrolet Bolt EV | 2021, 2022, 2023 |
| Chevrolet Camaro | 2021, 2022, 2023, 2024 |
| Chevrolet Colorado | 2021, 2022, 2023 |
| Chevrolet Corvette | 2021, 2022, 2023, 2024, 2025 |
| Chevrolet Equinox | 2021, 2022, 2023, 2024, 2025, 2026 |
| Chevrolet Malibu | 2021, 2022, 2023, 2024, 2025 |
| Chevrolet Silverado 1500 | 2021 |
| Chevrolet Silverado 2500 | 2021, 2022, 2023 |
| Chevrolet Suburban | 2021, 2022, 2023 |
| Chevrolet Tahoe | 2021, 2022 |
| Chevrolet Trailblazer | 2021, 2022, 2023, 2024, 2025, 2026 |
| Chevrolet Traverse | 2021, 2022, 2023, 2024, 2025, 2026 |
| Chevrolet Trax | 2021, 2022, 2024, 2025, 2026 |
| GMC Acadia | 2021, 2022, 2023, 2024, 2025, 2026 |
| GMC Canyon | 2021, 2022, 2023 |
| GMC Sierra 1500 | 2021 |
| GMC Terrain | 2021, 2022, 2023, 2024, 2025 |
| GMC Yukon | 2021, 2022 |
Every document filed under PIC6551B
| Document ID | Filed | Type |
|---|---|---|
| PIC6551B | May 11, 2026 | Service bulletin |
Questions buyers ask
What is TSB PIC6551B?
PIC6551B is a service bulletin filed with NHTSA by Buick, Cadillac, Chevrolet and GMC, covering 21 Buick, Cadillac, Chevrolet and GMC models across the 2021–2026 model years. NHTSA's summary reads: This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues
Which vehicles does PIC6551B cover?
NHTSA's file names Buick Enclave (2021–2026); Cadillac Escalade (2021–2023); Chevrolet Blazer (2021–2026); Chevrolet Bolt EV (2021–2023); Chevrolet Camaro (2021–2024); Chevrolet Colorado (2021–2023); Chevrolet Corvette (2021–2025); Chevrolet Equinox (2021–2026); Chevrolet Malibu (2021–2025); Chevrolet Silverado 1500 (2021), and 11 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.
Is TSB PIC6551B a recall, and is the repair free?
No. PIC6551B 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 PIC6551B?
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 PIC6551B, 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 PIC6551B. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.