Cadillac bulletin PIC6538
What it saysThis Preliminary information communicates that a repeat brake pulsation maybe cause by a customer painting the wheels and paint being on the hub surface of the wheel. NHTSA’s full summary ↓
Cadillac filed this with NHTSA as a service bulletin dated Feb 6, 2024, received Mar 18, 2024, about the wheels. It names 6 model years (2022–2024). 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.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThis Preliminary information communicates that a repeat brake pulsation maybe cause by a customer painting the wheels and paint being on the hub surface of the wheel.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| PIC6538 | Service bulletin | Feb 6, 2024 | 10251684 | not found |
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.
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What owners reported
Source: NHTSA complaint databaseOwners of the 6 model years this bulletin names have filed 43 complaints with NHTSA since 2015.
The front wheels are locking up sometimes when either hitting a bump in the road or just out of the blue while driving. The auto braking will engage quickly and then shut off
2022 Cadillac CT5 · Wheels · filed with NHTSA Mar 18, 2025 · ODI 11648919
A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.
More bulletins about the wheels
Source: same model, same component group14 other manufacturer communications filed against these Cadillac models under the same component group (wheels), newest first. The eight newest are listed; the rest are on the Cadillac list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 25-NA-156 | Service bulletin | Jun 7, 2025 | This service bulletin provides information on Tire Sidewall Irregularities. |
| 08-03-10-006I | Service bulletin | Mar 14, 2025 | This service bulletin provides a procedure on how to clean and resurface aluminum wheel bead seats for vehicles that have the condition of T… |
| 21-NA-043 | Service bulletin | Jan 31, 2025 | This informational bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before bein… |
| 24-NA-267 | Service bulletin | Dec 12, 2024 | This service bulletin provides information to dealership personnel that the Michelin Pilot Sport Cup 2 R tires that are originally equipped… |
| 13-03-10-001L | Service bulletin | Oct 3, 2024 | This service bulletin provides information on summer tire performance and tire cold weather cracking. |
| 17-NA-087 | Service bulletin | Sep 26, 2024 | This informational bulletin provides information on Characteristics of Wide Low Aspect Ratio Tires, Vehicle Pulls Left or Right, Wanders, Fo… |
| 00-03-10-002M | Service bulletin | Jul 22, 2024 | This service bulletin provides information on Chemical Staining, Pitting, Corrosion and/or Spotted Appearance of Chromed Aluminum Wheels. |
| 18-NA-067 | Service bulletin | May 6, 2024 | This service bulletin provides information for cleaning brake dust off of aluminum or chrome wheels. |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Cadillac, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Cadillac PIC6538 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 PIC6538 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. Every GM warranty extension on file lists the ones GM has filed.
Which vehicles does PIC6538 cover?
The manufacturer filed it against 6 model years: 2024 Cadillac CT4, 2023 Cadillac CT4, 2022 Cadillac CT4, 2024 Cadillac CT5, 2023 Cadillac CT5, 2022 Cadillac CT5. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.