Buick bulletin 18-NA-056
What it saysThis service bulletin provides a procedure to apply aluminum butyl tape around the lower side object modules and the fascia to aid in deflecting the radar away from the ground and stop triggering false alerts. NHTSA’s full summary ↓
Buick filed this with NHTSA as a service bulletin dated Oct 2, 2024, received Nov 9, 2024, about the lane departure. It names 7 model years (2017–2023). 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 service bulletin provides a procedure to apply aluminum butyl tape around the lower side object modules and the fascia to aid in deflecting the radar away from the ground and stop triggering false alerts.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 18-NA-056 | Service bulletin | Oct 2, 2024 | 11010415 | PDF, 723 KB |
What the document itself lists
Part the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 22709067 | There is enough material to do additional vehicles. Store | 1 | eBay Motors → |
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 6480458 | Apply Butyl Tape to Side Object Sensing Module | 0.6 hrs |
Read by machine from the document NHTSA serves (4 pages), read Sep 30, 2026. A part number is shown only where it matches Buick’s own catalogue shape, an operation only with its code and time, and a description only where the reader got it whole; anything it could not settle is left out, and the PDF is the record. Times are the manufacturer’s warranty allowances, not a quote. Listings and prices on eBay Motors are the seller’s.
Affiliate disclosure: some links on this page are affiliate links. If you request a quote or buy through them we may earn a commission at no extra cost to you. Nothing on this page changes because of it.
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.
Find the blind spot detection for the 2023 Encore →Affiliate disclosure: some links on this page are affiliate links. If you request a quote or buy through them we may earn a commission at no extra cost to you. Nothing on this page changes because of it.
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 7 model years this bulletin names have filed 473 complaints with NHTSA since 2015. 59 of them name Electrical System — 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.
1. What component or system failed or malfunctioned, and is it available for inspection upon request? The windshield wipers stop and or turn on intermittently. They have stopped in the middle of a rainstorm on more than one occasion and they have turned on while just driving normally without any of the controls being touched. 2.
2019 Buick Encore · Electrical System · filed with NHTSA Sep 20, 2021 · ODI 11433604
I bought my car, new, on 10/1/ 2023. The middle of November i noticed the headlights randomly dimming. On 12/3/23 I to the dealership to have them looked at. I was told there was nothing wrong but make an appt. they had my car 3 times in less than 2 months. I repeatedly told them my headlights were dimming and or going off.
2023 Buick Encore · Electrical System · filed with NHTSA Apr 26, 2024 · ODI 11585477
Feel like the car is loosing drive/power and not accelerating. I was driving and the engine light started flashing. No power to go up the hill, it could have gone backwards. Car does not accelerate made a whirring noise when it was turned off. Dangerous situation. Service Bulletin #N212338400
2018 Buick Encore · Electrical System · filed with NHTSA Jul 5, 2022 · ODI 11472397
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 lane departure
Source: same model, same component group2 other manufacturer communications filed against the Buick Encore under the same component group (lane departure), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| PIC6587 | Service bulletin | Dec 6, 2024 | This Preliminary information communicates Thus the active safety systems maybe inoperable and to perform a module reset to correct. |
| PIC6552D | Service bulletin | Dec 6, 2024 | This Preliminary information communicates how to recover the Image Processing Module. |
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 18-NA-056 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 18-NA-056 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 18-NA-056 cover?
The manufacturer filed it against 7 model years: 2023 Buick Encore, 2022 Buick Encore, 2021 Buick Encore, 2020 Buick Encore, 2019 Buick Encore, 2018 Buick Encore and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.