Chevrolet bulletin PIT6425C
Chevrolet filed this with NHTSA as a service bulletin dated Jan 16, 2026, received Jan 19, 2026, about the unknown or other. It names 211 model years (2019–2027). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThis Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC's
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| PIT6425C | Service bulletin | Jan 16, 2026 | 11027697 | not yet checked |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themand 92 more model years on this site.
Also filed against model years this site has no page for: 2019 Chevrolet 3500; 2020 Chevrolet 3500; 2021 Chevrolet 3500; 2022 Chevrolet 3500; 2024 Chevrolet 3500HD; 2019 Chevrolet 4500; 2020 Chevrolet 4500; 2022 Chevrolet 4500; 2019 Chevrolet 4500HD; 2020 Chevrolet 4500HD; 2021 Chevrolet 4500HD; 2022 Chevrolet 4500HD; 2023 Chevrolet 4500HD; 2019 Chevrolet 4500XD; 2020 Chevrolet 4500XD; 2021 Chevrolet 4500XD; 2022 Chevrolet 4500XD; 2019 Chevrolet 5500HD; 2020 Chevrolet 5500HD; 2021 Chevrolet 5500HD; 2022 Chevrolet 5500HD; 2023 Chevrolet 5500HD; 2019 Chevrolet 5500XD; 2020 Chevrolet 5500XD; 2021 Chevrolet 5500XD; 2022 Chevrolet 5500XD; 2019 Chevrolet 6500; 2019 Chevrolet 6500HD; 2020 Chevrolet 6500HD; 2021 Chevrolet 6500HD; 2022 Chevrolet 6500HD; 2023 Chevrolet 6500HD; 2024 Chevrolet Bolt EV; 2025 Chevrolet Brightdrop 400; 2026 Chevrolet Brightdrop 400; 2025 Chevrolet Brightdrop 600; 2026 Chevrolet Brightdrop 600; 2019 Chevrolet LOW CAB Forward 3500; 2020 Chevrolet LOW CAB Forward 3500; 2021 Chevrolet LOW CAB Forward 3500; 2022 Chevrolet LOW CAB Forward 3500; 2023 Chevrolet LOW CAB Forward 3500; 2024 Chevrolet LOW CAB Forward 3500; 2025 Chevrolet LOW CAB Forward 3500; 2026 Chevrolet LOW CAB Forward 3500; 2019 Chevrolet LOW CAB Forward 4500; 2020 Chevrolet LOW CAB Forward 4500; 2021 Chevrolet LOW CAB Forward 4500; 2022 Chevrolet LOW CAB Forward 4500; 2023 Chevrolet LOW CAB Forward 4500; 2024 Chevrolet LOW CAB Forward 4500; 2025 Chevrolet LOW CAB Forward 4500; 2026 Chevrolet LOW CAB Forward 4500; 2019 Chevrolet LOW CAB Forward 5500; 2020 Chevrolet LOW CAB Forward 5500; 2021 Chevrolet LOW CAB Forward 5500; 2022 Chevrolet LOW CAB Forward 5500; 2023 Chevrolet LOW CAB Forward 5500; 2024 Chevrolet LOW CAB Forward 5500; 2025 Chevrolet LOW CAB Forward 5500 and 19 more.
A vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
Common questions
Source: NHTSA, 49 CFR 579.5Is Chevrolet PIT6425C a recall?
No. A service bulletin is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the PIT6425C repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way.
Which vehicles does PIT6425C cover?
The manufacturer filed it against 211 model years: 2026 Chevrolet Blazer, 2025 Chevrolet Blazer, 2024 Chevrolet Blazer, 2023 Chevrolet Blazer, 2022 Chevrolet Blazer, 2021 Chevrolet Blazer and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.