Cadillac bulletin 661.10
Cadillac filed this with NHTSA as a over-the-air update dated Jun 25, 2026, received Feb 24, 2026, about the unknown or other — 12 documents under this number. It names 15 model years (2023–2026). A over-the-air update is not a safety recall — there is no NHTSA campaign number and no federal requirement — but it is usually work the manufacturer pays for on the vehicles it names; the dealer checks the VIN against the manufacturer’s list.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communication• Improvements to the infotainment system from Android update. This Android update removes Alexa Built-in (if supported). Google Assistant will remain available. • Fixes to improve responsiveness for the center display, driver display, and camera. • Fixes for Apple CarPlay functionality and connectivity (if supported). • Fixes to help ensure proper functionality for Bluetooth. • Improvements to audio system performance.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 661.10 | Over-the-air update | Jun 25, 2026 | 11034047 | PDF, 193 KB |
| 661.10 | Over-the-air update | May 29, 2026 | 11033004 | not yet checked |
| 661.10 | Over-the-air update | May 27, 2026 | 11032969 | not yet checked |
| 661.10 | Emissions | Apr 28, 2026 | 11031820 | not yet checked |
| 661.10 | Over-the-air update | Apr 27, 2026 | 11031763 | not yet checked |
| 661.10 | Over-the-air update | Apr 23, 2026 | 11031765 | not yet checked |
| 661.10 | Over-the-air update | Apr 16, 2026 | 11031819 | not yet checked |
| 661.10 | Over-the-air update | Mar 26, 2026 | 11030522 | not yet checked |
| 661.10 | Over-the-air update | Mar 17, 2026 | 11030529 | not yet checked |
| 661.10 | Over-the-air update | Mar 17, 2026 | 11030521 | not yet checked |
| 661.10 | Over-the-air update | Mar 9, 2026 | 11030462 | not yet checked |
| 661.10 | Over-the-air update | Feb 24, 2026 | 11028982 | 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 themA 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 Cadillac 661.10 a recall?
No. A over-the-air update 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 661.10 repair free?
A over-the-air update is usually paid by the manufacturer on the vehicles it names, within the terms and time limit the document sets; the dealer checks the VIN against the manufacturer’s list.
Which vehicles does 661.10 cover?
The manufacturer filed it against 15 model years: 2026 Cadillac CT4, 2025 Cadillac CT4, 2026 Cadillac CT5, 2025 Cadillac CT5, 2026 Cadillac Celestiq, 2025 Cadillac Celestiq and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.