TSB PIT6455B — Chevrolet and GMC Service bulletin
PIT6455B is a service bulletin on file with NHTSA for 2 Chevrolet and GMC models, 2025–2026 model years. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. This PI communications information that Engineering is investigating the Service Driver Assist message with current DTC B1B2F Telematics Control Module and U1624 Image Processing Control Module setting.
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Vehicles and model years PIT6455B names
| Vehicle | Model years |
|---|---|
| Chevrolet Silverado 1500 | 2025, 2026 |
| GMC Sierra 1500 | 2025, 2026 |
Every document filed under PIT6455B
| Document ID | Filed | Type |
|---|---|---|
| PIT6455B | July 13, 2026 | Service bulletin |
Questions buyers ask
What is TSB PIT6455B?
PIT6455B is a service bulletin filed with NHTSA by Chevrolet and GMC, covering 2 Chevrolet and GMC models across the 2025–2026 model years. NHTSA's summary reads: This PI communications information that Engineering is investigating the Service Driver Assist message with current DTC B1B2F Telematics Control Module and U1624 Image Processing Control Module setting.
Which vehicles does PIT6455B cover?
NHTSA's file names Chevrolet Silverado 1500 (2025–2026); GMC Sierra 1500 (2025–2026). 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 PIT6455B a recall, and is the repair free?
No. PIT6455B 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 PIT6455B?
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 PIT6455B, 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 PIT6455B. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.