GM bulletin 18-NA-162
What it saysThis technical bulletin provides a procedure for air conditioning refrigerant desiccant replacement due to A/C Not Cooling or refrigerant loss. NHTSA’s full summary ↓
GM filed this with NHTSA as a service bulletin dated Jan 17, 2024, received Feb 2, 2024, about the equipment. It names 14 model years across Chevrolet and GMC (2018–2024). 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.
One page for every brand it was filed under. Each brand’s bulletins: Chevrolet · GMC.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThis technical bulletin provides a procedure for air conditioning refrigerant desiccant replacement due to A/C Not Cooling or refrigerant loss.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 18-NA-162 | Service bulletin | Jan 17, 2024 | 10249604 | PDF, 72 KB |
What the document itself lists
The manufacturer titles it “A/C Not Cooling, A/C System Low or Empty of Refrigerant”.
Part the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 84555537 | — | 1 |
Read by machine from the document NHTSA serves (2 pages), read Sep 30, 2026. A part number is shown only where it matches GM’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.
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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 defroster/defogger/hvac system for the 2024 Equinox →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 themChevrolet 7 model years
GMC 7 model years
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 14 model years this bulletin names have filed 2,448 complaints with NHTSA since 2015. 60 of them name Visibility/Wiper — 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.
On the 2018 Chevrolet Equinox, the 13 owners who gave an odometer reading for Visibility/Wiper reported it at a median of 21,000 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
Intense glare of the dashboard onto the windshield while driving. I don't know if it's due to the type of plastic the dashboard is made out of, or the grade of glass the windshield is, or both, but the glare the dashboard puts on the windshield is SEVERE and happens at ALL times of day, regardless of the car's orientation towards the…
2024 Chevrolet Equinox · Visibility/Wiper · filed with NHTSA Oct 23, 2024 · ODI 11621459
The contact owns a 2022 Chevrolet Equinox. The contact stated that while driving at an undisclosed speed, the sunroof exploded without impact. There was a hole detected in the glass. There were no reported injuries. The vehicle was taken to the local dealer, and it was determined that the sunroof assembly needed to be replaced.
2022 Chevrolet Equinox · Visibility/Wiper · filed with NHTSA Feb 9, 2023 · ODI 11506410
The contact leases a 2019 Chevrolet Equinox. While driving various speeds, the passenger and driver side windows and side view mirrors had a shadow and white lines that obstructed the view. There were no warning indicators illuminated. The manufacturer was contacted and provided case number: 9-5169987780.
2019 Chevrolet Equinox · Visibility/Wiper · filed with NHTSA Apr 18, 2019 · ODI 11197202
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 group53 other manufacturer communications filed against these GM models under the same component group (equipment), newest first. The eight newest are listed; the rest are on the Chevrolet list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| PIP5601B | Service bulletin | Jul 18, 2025 | This Preliminary Information communication provides information to the technician about vibration complaints that are one of the most challe… |
| 22-NA-096 | Service bulletin | Mar 29, 2025 | This informational bulletin provides information for dealers/technicians on Customer Education Bulletin for Google Built In Radio. |
| 17-NA-073 | Service bulletin | Mar 5, 2025 | This warranty administration bulletin provides policy information with the field action courtesy transportation policy. |
| 17-NA-331 | Service bulletin | Jan 17, 2025 | Rear View Camera Guidelines Not Present at Times Condition Some customers may report that the Rear View Camera (RVC) guidelines are temp… |
| 22-NA-038 | Service bulletin | Dec 14, 2024 | This warranty bulletin provides information on Customer Concern Not Duplicated (CCND) Labor Operation Numbers. |
| 18-NA-263 | Service bulletin | Dec 14, 2024 | This warranty administration bulletin provides policy information for variable diagnostic time allowances on select labor operations… |
| 24-NA-040 | Service bulletin | Oct 11, 2024 | This service bulletin provides information on All hazmat parts being returned to the Warranty Parts Center (WPC) must be shipped using Centr… |
| 23-NA-154 | Service bulletin | Oct 2, 2024 | This bulletin provides information on Warranty Administration â Required Operating Procedures - 8 Points (U.S. Only). |
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 GMC, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is GM 18-NA-162 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-162 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-162 cover?
The manufacturer filed it against 14 model years across 2 brands (Chevrolet and GMC): 2024 Chevrolet Equinox, 2023 Chevrolet Equinox, 2022 Chevrolet Equinox, 2021 Chevrolet Equinox, 2020 Chevrolet Equinox, 2019 Chevrolet Equinox and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.