TSB PIT6440 — Buick, Cadillac, Chevrolet and GMC Service bulletin
PIT6440 is a service bulletin on file with NHTSA for 19 Buick, Cadillac, Chevrolet and GMC models, 2020–2022 model years. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. The Driver Information Center may display a message of Transport Mode On after the ignition is cycled.
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Vehicles and model years PIT6440 names
Every document filed under PIT6440
| Document ID | Filed | Type |
|---|---|---|
| PIT6440 | October 4, 2025 | Service bulletin |
Questions buyers ask
What is TSB PIT6440?
PIT6440 is a service bulletin filed with NHTSA by Buick, Cadillac, Chevrolet and GMC, covering 19 Buick, Cadillac, Chevrolet and GMC models across the 2020–2022 model years. NHTSA's summary reads: The Driver Information Center may display a message of Transport Mode On after the ignition is cycled.
Which vehicles does PIT6440 cover?
NHTSA's file names Buick Enclave (2020–2022); Cadillac Escalade (2020); Chevrolet Blazer (2020); Chevrolet Bolt EV (2020–2022); Chevrolet Camaro (2020, 2022); Chevrolet Colorado (2020); Chevrolet Corvette (2020); Chevrolet Equinox (2020); Chevrolet Impala (2020); Chevrolet Malibu (2020), and 9 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 PIT6440 a recall, and is the repair free?
No. PIT6440 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 PIT6440?
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 PIT6440, 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 PIT6440. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.