Buick bulletin PIC6596
What it saysThis Preliminary information communicates to the technician 3 ways to access the trunk when the electrical release latch is inoperative. NHTSA’s full summary ↓
Buick filed this with NHTSA as a service bulletin dated Feb 24, 2025, received Mar 2, 2025, about the structure. It names 4 model years (2016–2019). 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 to the technician 3 ways to access the trunk when the electrical release latch is inoperative.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| PIC6596 | Service bulletin | Feb 24, 2025 | 11014618 | PDF, 53 KB |
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.
Doing the repair yourself, or pricing it before the shop does? Search the part by fitment on eBay Motors — the listing and the price are the seller’s.
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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 4 model years this bulletin names have filed 55 complaints with NHTSA since 2015. 15 of them name Structure — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
The back window on the convertible top has separated from the fabric. Buick dealership said it was not a covered item under the extended warranty. We tried to glue it back down but it keeps separating all around. Dangerous situation because it could separate completely during travel and cause an accident/injury to others.
2016 Buick Cascada · Structure · filed with NHTSA Feb 18, 2026 · ODI 11718833
The contact owns a 2019 Buick Cascada. The contact stated that the convertible top rear glass had significantly detached from the top cover material. The vehicle was taken to the dealer, where it was determined that the entire convertible top needed to be replaced. The vehicle was not repaired.
2019 Buick Cascada · Structure · filed with NHTSA Jul 3, 2025 · ODI 11671081
The contact owns a 2019 Buick Cascada. The contact stated while driving at an undisclosed speed during a rainstorm, water started entering the vehicle through the rear windshield. The contact stated that the rear windshield was separating from the seal. No warning lights were illuminated.
2019 Buick Cascada · Structure · filed with NHTSA Jan 2, 2025 · ODI 11633695
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 structure
Source: same model, same component group4 other manufacturer communications filed against the Buick Cascada under the same component group (structure), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 05-08-51-001L | Service bulletin | Feb 20, 2025 | This informational bulletin provides a procedure on how to remove the paint stain that may present itself under the shipping film. |
| 22-NA-244 | Warranty extension | Jan 30, 2025 | This warranty administration service bulletin provides information about GM Accessories - Dealer-Installed, Repaired or Replaced During Warr… |
| PI0281K | Service bulletin | Jan 18, 2024 | This preliminary informational (PI) bulletin provides information to dealership personnel which may be helpful when addressing underbody com… |
| 99-08-51-001F | Service bulletin | Jun 30, 2023 | This service bulletin provides information on Paintless Dent Repair Process. |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Buick, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Buick PIC6596 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 PIC6596 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 PIC6596 cover?
The manufacturer filed it against 4 model years: 2019 Buick Cascada, 2018 Buick Cascada, 2017 Buick Cascada, 2016 Buick Cascada. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.