GM bulletin PIC6556G
What it saysThis Preliminary information communicates to check the drivers monitoring camera for a B1DD0 SYM57 or B0126 SYM82 setting with no other DTCs. NHTSA’s full summary ↓
GM filed this with NHTSA as a service bulletin dated Dec 6, 2024, received Dec 9, 2024, about the forward collision avoidance. It names 7 model years across Chevrolet and Buick (2024–2025). 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.
One page for every brand it was filed under. Each brand’s bulletins: Chevrolet · Buick.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThis Preliminary information communicates to check the drivers monitoring camera for a B1DD0 SYM57 or B0126 SYM82 setting with no other DTCs.
Trouble codes it names: B0126 B1DD0 B1599 1 of 3 read from the document itself
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| PIC6556G | Service bulletin | Dec 6, 2024 | 11011692 | PDF, 32 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.
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Model years it names
Source: as the manufacturer filed themChevrolet 6 model years
Buick 1 model year
A 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 956 complaints with NHTSA since 2015. 195 of them name Forward Collision Avoidance — 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 contact owns a 2025 Chevrolet Suburban. The contact stated that the "Adaptive Cruise Control Temporarily Unavailable" message was displayed on the instrument panel. The vehicle was taken to a local dealer where the vehicle was diagnosed, and the contact was advised that the radar was faulty and needed to be replaced.
2025 Chevrolet Suburban · Forward Collision Avoidance · filed with NHTSA Jul 24, 2025
Good day, We purchased our 2024 Chevy Equinox EV a month and a half ago. The issue we are having is very concerning. The vehicle will suddenly come to a complete stop at unexpected times. At first, it happened 3 times while we were backing up. There was no object in the road, no warning beeps, no shaking of the seat.
2024 Chevrolet Equinox · Forward Collision Avoidance · filed with NHTSA Oct 21, 2024
I am writing to report a serious safety concern with my newly purchased. I believe this issue, if unaddressed, could lead to accidents. Specifically, when I am stopped at a stop sign with another vehicle behind me and the light changes to green, I begin to drive forward.
2024 Chevrolet Traverse · Forward Collision Avoidance · filed with NHTSA Dec 2, 2024
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 forward collision avoidance
Source: same model, same component group21 other manufacturer communications filed against these GM models under the same component group (forward collision avoidance), newest first. The eight newest are listed; the rest are on the Chevrolet list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 25-NA-118 | Service bulletin | May 8, 2025 | This service bulletin provides information for the technicians to use a Customer Concern Verification sheet to facilitate the questions need… |
| 25-NA-060 | Service bulletin | Mar 11, 2025 | This service bulletin provides information for dealers/technicians on Diagnostic Aid - Super Cruise Unavailable. |
| 25-NA-006 | Service bulletin | Jan 15, 2025 | This technical bulletin provides a procedure to correct the condition of Super Cruise Unavailable Message with DTC U1615 Set or Stored. |
| PIT6186D | Service bulletin | Dec 16, 2024 | This Preliminary information communicates that a customer may see a Super Cruise Unavailable message with multiple codes setting and Enginee… |
| PIT6289 | Service bulletin | Nov 21, 2024 | This Preliminary information communicates information that Engineering is aware of a concern where the collision / detection alert changes f… |
| PIT6167E | Service bulletin | Nov 8, 2024 | This Preliminary information communicates a vehicle may come to the dealer with a complaint of a Super Cruise Unavailable message. The tech… |
| PIT6268 | Service bulletin | Oct 29, 2024 | This Preliminary information communicates where the driver is unable to activate Super Cruise along with a DIC message stating "Super Cruise… |
| PIT6186C | Service bulletin | Oct 25, 2024 | This Preliminary information communicates that a customer may see a Super Cruise Unavailable message with multiple codes setting and Enginee… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Chevrolet and Buick, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is GM PIC6556G 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 PIC6556G 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.
Which vehicles does PIC6556G cover?
The manufacturer filed it against 7 model years across 2 brands (Chevrolet and Buick): 2025 Buick Enclave, 2024 Chevrolet Equinox, 2024 Chevrolet Silverado, 2025 Chevrolet Suburban, 2025 Chevrolet Tahoe, 2025 Chevrolet Traverse and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.