TSB PIT6347B — Cadillac, Chevrolet and GMC Service bulletin
PIT6347B is a service bulletin on file with NHTSA for 4 Cadillac, Chevrolet and GMC models, 2021–2022 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 an issue with ABS SES MIL / Service Brake System / Service StabiliTrak / BSCM DTC P0606 P0562 and dealers to perform additional battery and connection testing.
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Vehicles and model years PIT6347B names
| Vehicle | Model years |
|---|---|
| Cadillac Escalade | 2021, 2022 |
| Chevrolet Suburban | 2021 |
| Chevrolet Tahoe | 2021 |
| GMC Yukon | 2021 |
Every document filed under PIT6347B
| Document ID | Filed | Type |
|---|---|---|
| PIT6347B | March 26, 2026 | Service bulletin |
Questions buyers ask
What is TSB PIT6347B?
PIT6347B is a service bulletin filed with NHTSA by Cadillac, Chevrolet and GMC, covering 4 Cadillac, Chevrolet and GMC models across the 2021–2022 model years. NHTSA's summary reads: This Preliminary information communicates an issue with ABS SES MIL / Service Brake System / Service StabiliTrak / BSCM DTC P0606 P0562 and dealers to perform additional battery and connection testing.
Which vehicles does PIT6347B cover?
NHTSA's file names Cadillac Escalade (2021–2022); Chevrolet Suburban (2021); Chevrolet Tahoe (2021); GMC Yukon (2021). 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 PIT6347B a recall, and is the repair free?
No. PIT6347B 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 PIT6347B?
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 PIT6347B, 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 PIT6347B. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.