TSB PIT6393L — Buick, Chevrolet and GMC Service bulletin
PIT6393L is a service bulletin on file with NHTSA for 6 Buick, Chevrolet and GMC 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 Preliminary Information is to inform customers to follow diagnostics if resetting, disconnecting the module did not correct it.
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Vehicles and model years PIT6393L names
| Vehicle | Model years |
|---|---|
| Buick Enclave | 2025, 2026 |
| Chevrolet Colorado | 2024, 2025 |
| Chevrolet Equinox | 2024, 2025, 2026 |
| Chevrolet Traverse | 2024, 2025, 2026 |
| GMC Acadia | 2024, 2025, 2026 |
| GMC Terrain | 2025, 2026 |
Every document filed under PIT6393L
| Document ID | Filed | Type |
|---|---|---|
| PIT6393L | May 14, 2026 | Service bulletin |
Questions buyers ask
What is TSB PIT6393L?
PIT6393L is a service bulletin filed with NHTSA by Buick, Chevrolet and GMC, covering 6 Buick, Chevrolet and GMC models across the 2024–2026 model years. NHTSA's summary reads: This Preliminary Information is to inform customers to follow diagnostics if resetting, disconnecting the module did not correct it.
Which vehicles does PIT6393L cover?
NHTSA's file names Buick Enclave (2025–2026); Chevrolet Colorado (2024–2025); Chevrolet Equinox (2024–2026); Chevrolet Traverse (2024–2026); GMC Acadia (2024–2026); GMC Terrain (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 PIT6393L a recall, and is the repair free?
No. PIT6393L 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 PIT6393L?
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 PIT6393L, 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 PIT6393L. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.