Service bulletin PIT6440
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
| Type | Service bulletin |
|---|---|
| NHTSA id | 11024439 |
| Published by NHTSA | 2025-10-24 |
| Manufacturer's number | PIT6440 |
| Manufacturer's date | 2025-10-04 |
| NHTSA component | UNKNOWN OR OTHER |
NHTSA's summary
The Driver Information Center may display a message of Transport Mode On after the ignition is cycled.
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
| BRIGHTDROP 600 ELCV | 2023 to 2024 |
|---|---|
| BRIGHTDROP EV600 | 2022 |
| BRIGHTDROP ZEVO 400 | 2024 (the catalog's model; the bulletin names a series or trim of it) |
| BRIGHTDROP ZEVO 600 | 2023, 2024 (the catalog's model; the bulletin names a series or trim of it) |
| BUICK ENCLAVE | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| BUICK ENCORE | 2020, 2021, 2022 |
| BUICK ENCORE | 2023 to 2026 |
| BUICK ENCORE GX | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| BUICK ENVISION | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| BUICK ENVISTA | 2024, 2025, 2026 |
| BUICK LACROSSE | 2020 |
| BUICK REGAL | 2020 |
| BUICK REGAL TOURX | 2020 |
| CADILLAC CELESTIQ | 2025, 2026 |
| CADILLAC CT4 | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| CADILLAC CT5 | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| CADILLAC CT6 | 2020 |
| CADILLAC CT6 | 2021 |
| CADILLAC ESCALADE | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| CADILLAC ESCALADE ESV | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| CADILLAC ESCALADE ESV IQ | 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CADILLAC ESCALADE ESV IQL | 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CADILLAC ESCALADE IQ | 2025, 2026 |
| CADILLAC ESCALADE IQL | 2026 |
| CADILLAC LYRIQ | 2023, 2024, 2025, 2026 |
| CADILLAC OPTIQ | 2025, 2026 |
| CADILLAC VISTIQ | 2026 |
| CADILLAC XT4 | 2020, 2021, 2022, 2023, 2024, 2025 |
| CADILLAC XT4 | 2026 |
| CADILLAC XT5 | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| CADILLAC XT6 | 2020, 2021, 2022, 2023, 2024, 2025 |
| CADILLAC XT6 | 2026 |
| CADILLAC XTS | 2020 |
| CHEVROLET 3500 | 2020 |
| CHEVROLET 3500 | 2021 |
| CHEVROLET 3500 | 2022 |
| CHEVROLET 3500HD | 2024 |
| CHEVROLET 4500 | 2020 |
| CHEVROLET 4500 | 2022 |
| CHEVROLET 4500HD | 2020, 2021, 2022, 2023 |
| CHEVROLET 4500XD | 2020, 2021, 2022 |
| CHEVROLET 5500HD | 2020, 2021, 2022, 2023 |
| CHEVROLET 5500XD | 2020, 2021, 2022 |
| CHEVROLET 6500HD | 2020 to 2023 |
| CHEVROLET BLAZER | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| CHEVROLET BLAZER EV | 2024, 2025, 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET BOLT EUV | 2022, 2023 |
| CHEVROLET BOLT EV | 2020, 2021, 2022, 2023 |
| CHEVROLET BOLT EV | 2024 |
| CHEVROLET BRIGHTDROP 400 | 2025, 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET BRIGHTDROP 600 | 2025, 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET CAMARO | 2020, 2021, 2022, 2023, 2024 |
| CHEVROLET COLORADO | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| CHEVROLET CORVETTE | 2020, 2021, 2022, 2023, 2024, 2025 |
| CHEVROLET CORVETTE CONVERTIBLE | 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET CORVETTE CONVERTIBLE E-RAY | 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET CORVETTE COUPE | 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET CORVETTE COUPE E-RAY | 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET CORVETTE E-RAY | 2024 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET EQUINOX | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| CHEVROLET EQUINOX EV | 2024, 2025, 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET EXPRESS | 2020, 2021 |
| CHEVROLET EXPRESS | 2023, 2024, 2025, 2026 |
| CHEVROLET EXPRESS 2500 | 2023, 2024 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET EXPRESS 2500 | 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET EXPRESS 3500 | 2020, 2021, 2022, 2023, 2024 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET EXPRESS 3500 | 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET EXPRESS 4500 | 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET EXPRESS CUTAWAY VAN | 2020, 2021, 2022, 2023, 2024 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET IMPALA | 2020 |
| CHEVROLET LOW CAB FORWARD 3500 | 2026 |
| CHEVROLET LOW CAB FORWARD 5500 | 2026 |
| CHEVROLET LOW CAB FORWARD 6500 | 2026 |
| CHEVROLET LOW CAB FORWARD N SERIES | 2025 |
| CHEVROLET MALIBU | 2020, 2021, 2022, 2023, 2024, 2025 |
| CHEVROLET SILVERADO 1500 | 2020, 2021, 2022, 2023, 2024, 2025, 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SILVERADO 2500 | 2020, 2021, 2022, 2023, 2024, 2025, 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SILVERADO 3500 | 2020, 2021, 2022, 2023, 2024, 2025, 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SILVERADO 4500 | 2020, 2021, 2022, 2023, 2024, 2025, 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SILVERADO 5500 | 2020, 2021 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SILVERADO 5500 | 2023, 2024, 2025, 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SILVERADO 6500 | 2021, 2022, 2023, 2024, 2025, 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SILVERADO EV | 2024, 2025, 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SONIC | 2020 |
| CHEVROLET SPARK | 2020, 2021, 2022 |
| CHEVROLET SUBURBAN | 2020, 2021, 2022, 2023, 2024 |
| CHEVROLET SUBURBAN 1500 | 2021, 2022, 2023, 2024, 2025, 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET TAHOE | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| CHEVROLET TRAILBLAZER | 2020 |
| CHEVROLET TRAILBLAZER | 2021, 2022, 2023, 2024, 2025, 2026 |
| CHEVROLET TRAVERSE | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| CHEVROLET TRAX | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| CRUISE AV1 | 2023 |
| CRUISE ORIGIN | 2024 |
| GMC 3500HD | 2024 |
| GMC ACADIA | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| GMC CANYON | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| GMC HUMMER EV PICKUP | 2022, 2023, 2024, 2025, 2026 |
| GMC HUMMER EV SUV | 2024, 2025, 2026 |
| GMC SAVANA | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| GMC SAVANA 2500 | 2023 (the catalog's model; the bulletin names a series or trim of it) |
| GMC SAVANA 2500 | 2026 (the catalog's model; the bulletin names a series or trim of it) |
| GMC SAVANA 3500 | 2023 (the catalog's model; the bulletin names a series or trim of it) |
| GMC SAVANA 3500 | 2025, 2026 (the catalog's model; the bulletin names a series or trim of it) |
| GMC SAVANA 4500 | 2026 (the catalog's model; the bulletin names a series or trim of it) |
| GMC SAVANA CUTAWAY VAN | 2020, 2021, 2022, 2023, 2024 (the catalog's model; the bulletin names a series or trim of it) |
| GMC SIERRA 1500 | 2020, 2021, 2022, 2023, 2024, 2025, 2026 (the catalog's model; the bulletin names a series or trim of it) |
| GMC SIERRA 2500 | 2020, 2021, 2022, 2023, 2024, 2025, 2026 (the catalog's model; the bulletin names a series or trim of it) |
| GMC SIERRA 3500 | 2020, 2021, 2022, 2023, 2024, 2025, 2026 (the catalog's model; the bulletin names a series or trim of it) |
| GMC SIERRA DENALI | 2020 (the catalog's model; the bulletin names a series or trim of it) |
| GMC SIERRA EV | 2024, 2025, 2026 (the catalog's model; the bulletin names a series or trim of it) |
| GMC TERRAIN | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| GMC YUKON | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| GMC YUKON XL | 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
| GMC YUKON XL 1500 | 2023 (the catalog's model; the bulletin names a series or trim of it) |
Listing a model year does not mean every vehicle of it is concerned: the document says which.