GM bulletin PIT6132
What it saysThis Preliminary information communicates an issues with the HVAC making a hum buzz noise when the blower is set to a higher speed. NHTSA’s full summary ↓
GM filed this with NHTSA as a service bulletin dated Mar 12, 2024, received Apr 15, 2024, about the visibility/wiper. It names 26 model years across Chevrolet, GMC and Cadillac (2022–2024). 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 · Cadillac.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThis Preliminary information communicates an issues with the HVAC making a hum buzz noise when the blower is set to a higher speed. Engineering is working on a new HVAC door seal material to correct the noise.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| PIT6132 | Service bulletin | Mar 12, 2024 | 10253080 | not 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.
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 themChevrolet 13 model years
GMC 10 model years
Cadillac 3 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 26 model years this bulletin names have filed 5,480 complaints with NHTSA since 2015.
This is not a failure, just a poor design for cold temperatures. The windshield wipers are set low on the windshield, below where the defroster can reach. When it is cold/snowing outside, (which it does a lot in the Alaskan interior), the wipers remove the melted water from the windshield and push it down to where the wipers sit in the…
2023 Chevrolet Silverado 2500HD · Visibility/Wiper · filed with NHTSA Nov 30, 2024
Serious Safety Issue: While driving in the Rain, with the wipers on (actively working), randomly they will stop working. They will not work again until 10-15 minutes of time has passed. Any alternative setting makes no difference. During the 10-15 minutes of non-working wipers, there is nothing the driver can do…. Except wait.
2023 GMC Yukon · Visibility/Wiper · filed with NHTSA Sep 17, 2024
The wipers have stopped working on a least 6 different occasions. I have to pull over immediately due to not being able to see out the windshield. I try adjusting the switch through all the settings. I shut off the engine and restart the truck. I also turned off the rain sense function on the vehicle settings.
2023 Chevrolet Suburban · Visibility/Wiper · filed with NHTSA Sep 9, 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 visibility/wiper
Source: same model, same component group21 other manufacturer communications filed against these GM models under the same component group (visibility/wiper), newest first. The eight newest are listed; the rest are on the Chevrolet list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 25-NA-170 | Service bulletin | Sep 3, 2025 | This service bulletin provides a repair procedure to correct a customer concern of Loss of Air Conditioning, Weak Cooling, and/or Warm Air C… |
| 24-NA-164 | Service bulletin | Mar 20, 2025 | This bulletin provides information on Wiper Blade Maintenance Tips. |
| 24-NA-046 | Service bulletin | Mar 4, 2025 | This technical bulletin provides a procedure to correct the condition of Suction Cup Marks on Window Glass. |
| PIE0818 | Service bulletin | Feb 22, 2025 | This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer lis… |
| 24-NA-259 | Service bulletin | Nov 27, 2024 | This service bulletin provides a service procedure to correct customer concerns of Air Conditioning (A/C) Not Working and/or Blows Warm Air. |
| 23-NA-167 | Service bulletin | Nov 22, 2024 | This informational bulletin provides information on Outside Rear View Mirror Defog or Defrost Times Different for Passenger and Driver Mirro… |
| PI0754G | Service bulletin | Jul 31, 2024 | This PI provides information on Rear and Side Tempered Glass Spots (Quench Marks) and that they are a normal characteristic. |
| 16-NA-342 | Service bulletin | Jul 23, 2024 | This service bulletin provides a procedure to check the rearview mirror coax connector for looseness by disconnecting and reconnecting the e… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Chevrolet, GMC and Cadillac, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is GM PIT6132 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 PIT6132 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 PIT6132 cover?
The manufacturer filed it against 26 model years across 3 brands (Chevrolet, GMC and Cadillac): 2024 Cadillac Escalade, 2023 Cadillac Escalade, 2022 Cadillac Escalade, 2024 Chevrolet Silverado, 2023 Chevrolet Silverado, 2022 Chevrolet Silverado and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.