U3579 on Cadillac vehicles
U3579 is named on 7 Cadillac model years (2023–2026): 16 manufacturer filings and 0 owner reports in NHTSA’s files, across Escalade, Lyriq, Optiq, Vistiq.
Which Cadillac model years name U3579
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2026 Cadillac Escalade | Not specified | 6 | — |
| 2025 Cadillac Escalade | Not specified | 3 | — |
| 2024 Cadillac Lyriq | Fuel/Propulsion System | 2 | — |
| 2023 Cadillac Lyriq | Fuel/Propulsion System | 2 | — |
| 2026 Cadillac Vistiq | Not specified | 1 | — |
| 2025 Cadillac Lyriq | Not specified | 1 | — |
| 2025 Cadillac Optiq | Not specified | 1 | — |
A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.
Cadillac filings that name U3579
Source: NHTSA manufacturer communicationsBulletins and campaigns Cadillac filed with NHTSA whose summary names U3579. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- PIP6081 Service bulletin2025-08-22 · Unknown Or Other
- This Pi is to let dealer know that a program issue has been released and to not replace any hard for codes P2C8A, P2C8B, U3577, U3578, U3579, U357A, U357B, U357C, U357D, U357E, U357F, U3580, U3581, U3582, U3583, U3584, U2BAA, U2BAB, U2BAC, U2BAD, U2BAE,
- PIP6081B Service bulletin2026-02-23 · Unknown Or Other
- This Pi is to let dealer know that a program issue has been released and to not replace any hard for codes P2C8A, P2C8B, U3577, U3578, U3579, U357A, U357B, U357C, U357D, U357E, U357F, U3580, U3581, U3582, U3583, U3584, U2BAA, U2BAB, U2BAC, U2BAD, U2BAE,
- PIP6081C Service bulletin2026-07-14 · Unknown Or Other
- This Pi is to let dealer know that a program issue has been released and to not replace any hard for codes P2C8A, P2C8B, U3577, U3578, U3579, U357A, U357B, U357C, U357D, U357E, U357F, U3580, U3581, U3582, U3583, U3584, U2BAA, U2BAB, U2BAC, U2BAD, U2BAE,
- PIP6021 Service bulletin2024-11-01 · Fuel/Propulsion System
- This Preliminary Information communicates that, under certain conditions, a MIL (Malfunction Indicator Lamp) illumination or a "Service High Voltage" message may display on the IPC (Instrument Panel Cluster), and the 12V battery may experience discharge. In these instances, it is advised to perform BECM (Battery Energy Control Module) programming and execute the Manual Reset Shunt process. This ap
- PIP6021A Service bulletin2025-04-29 · Unknown Or Other
- This Preliminary Information communicates that, under certain conditions, a MIL (Malfunction Indicator Lamp) illumination or a "Service High Voltage" message may display on the IPC (Instrument Panel Cluster), and the 12V battery may experience discharge. In these instances, it is advised to perform BECM (Battery Energy Control Module) programming and execute the Manual Reset Shunt process. This ap
What U3579 means
Source: SAE J2012 / OBD-IIU3579 is a manufacturer-specific code: the second character is a 3, which under the OBD-II standard hands the definition to whoever built the vehicle. The same code can mean one thing on a Ford and something unrelated on a Hyundai. Any site that prints a single definition for it is guessing.
A stored code names the test that failed, never the part that caused it. The record above is what Cadillac and its owners have filed about it; the code’s page across every make has the whole file.
Common questions
Source: NHTSA files and the OBD-II standardIs U3579 a known problem on Cadillac vehicles?
It is a documented one: NHTSA's files hold 16 manufacturer filings and 0 owner reports naming U3579 on 7 Cadillac model years (2023–2026). Whether it is a problem on one particular car is a diagnosis, not a count — but a bulletin that names the code on your model year is the place to start.
Which Cadillac models does U3579 appear on most?
2026 Escalade (6 documents), 2025 Escalade (3 documents), 2024 Lyriq (2 documents).
Does U3579 on a Cadillac mean it is recalled?
No. Recalls are filed by campaign and matched by VIN; no recall is triggered by a scan tool. Check the VIN at nhtsa.gov/recalls, or open the model year's page here for the campaigns filed against it.