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Manufacturer communication · Service bulletin

GMC bulletin PIT5918A

What it saysThis Preliminary information communicates an issue where GM Accessory Illuminated Emblem may cause an issue with the left headlight/turn signal and dealership are to disable the Accessory Illuminated Emblem until a fix… NHTSA’s full summary ↓

GMC filed this with NHTSA as a service bulletin dated Mar 6, 2024, received Apr 15, 2024, about the equipment. It names 8 model years (2020–2022). 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 communication

This Preliminary information communicates an issue where GM Accessory Illuminated Emblem may cause an issue with the left headlight/turn signal and dealership are to disable the Accessory Illuminated Emblem until a fix is available.

Kind Service bulletin Manufacturer date Mar 6, 2024 Received by NHTSA Apr 15, 2024 Components Equipment

Document filed under this number

DocumentKindDatedNHTSA idAt NHTSA
PIT5918AService bulletinMar 6, 202410253067not 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.

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Model years it names

Source: as the manufacturer filed them

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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A weekly email, sent only in a week when GMC files something new with NHTSA for the model you pick — service bulletins, campaigns, warranty extensions, over-the-air notices, every model year. Nothing else is sent; one-click unsubscribe in every message. Separate from recall alerts.

What owners reported

Source: NHTSA complaint database

Owners of the 8 model years this bulletin names have filed 2,810 complaints with NHTSA since 2015.

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 equipment

Source: same model, same component group

106 other manufacturer communications filed against these GMC models under the same component group (equipment), newest first. The eight newest are listed; the rest are on the GMC list.

NumberKindDatedNHTSA’s summary
PIT6504Service bulletinApr 1, 2026This preliminary information communicates a normal characteristic where Some customers may comment that they have a " Forward Collision Unav…
PIP5601BService bulletinJul 18, 2025This Preliminary Information communication provides information to the technician about vibration complaints that are one of the most challe…
22-NA-161Service bulletinMay 17, 2025This informational bulletin provides information for dealers/technicians on power folding mirrors do not fold at the same speed.
22-NA-096Service bulletinMar 29, 2025This informational bulletin provides information for dealers/technicians on Customer Education Bulletin for Google Built In Radio.
17-NA-073Service bulletinMar 5, 2025This warranty administration bulletin provides policy information with the field action courtesy transportation policy.
21-NA-091Service bulletinDec 21, 2024This service bulletin provides information for customers/dealers/technicians on Normal Camera Display Operation - Flashing Diamond - Spot…
22-NA-038Service bulletinDec 14, 2024This warranty bulletin provides information on Customer Concern Not Duplicated (CCND) Labor Operation Numbers.
18-NA-263Service bulletinDec 14, 2024This warranty administration bulletin provides policy information for variable diagnostic time allowances on select labor operations…

Quote the number at the service desk. It is what the dealer’s system is keyed on.

Every manufacturer communication NHTSA holds for GMC, by the number printed on the letter.

Photo: Christian Buehner / Unsplash

Common questions

Source: NHTSA, 49 CFR 579.5

Is GMC PIT5918A 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 PIT5918A 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 PIT5918A cover?

The manufacturer filed it against 8 model years: 2022 GMC Sierra, 2021 GMC Sierra, 2020 GMC Sierra, 2022 GMC Sierra 2500HD, 2021 GMC Sierra 2500HD, 2020 GMC Sierra 2500HD and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.