Chevrolet 4500hd, Chevrolet 5500hd, Chevrolet 6500hd, model years 2019 to 2023. Filed by General Motors, LLC and reported to NHTSA on 13 April 2023. 40,428 vehicles potentially affected.
What the notice says General Motors. LLC (GM) is recalling certain 2019-2023 Chevrolet 4500HD, 5500HD, and 6500HD Medium-Duty trucks. The brake pressure sensor assembly may leak brake fluid into the brake pressure switch and cause an electrical short-circuit.
Is your vehicle included? Check with your VIN at NHTSA, or ask a dealer. This page is an independent copy of the notice, kept so you can see what changed after it was published. It is not the authority, and the authority’s own text is the one to act on.
General Motors's own number for this recall: N222375270. That is the number on the owner letter and on the dealer paperwork. 23V266 is the number NHTSA gave the same campaign, and the number this page is filed under. They are one recall, written two ways.
What owners ask about this recall
- Which vehicles does recall 23V266 cover?
- Chevrolet 4500Hd, Chevrolet 5500Hd, Chevrolet 6500Hd, model years 2019-2023.
- What is wrong with them?
- General Motors. LLC (GM) is recalling certain 2019-2023 Chevrolet 4500HD, 5500HD, and 6500HD Medium-Duty trucks. The brake pressure sensor assembly may leak brake fluid into the brake pressure switch and cause an electrical short-circuit.
- What can happen if it is not put right?
- An electrical short in the brake pressure switch can overheat the circuit and increase the risk of a fire while driving or parked.
- Is there a fix yet?
- Yes, and it is free. Owners are advised to park outside and away from structures until the recall repair is complete. Dealers will replace the master cylinder pressure sensor and inspect the wire harness, replacing it, if necessary, free of charge. Owner notification letters were mailed July 11, 2023.
- What should I do now?
- Check your own vehicle by its VIN with NHTSA, which is the record to act on. General Motors calls this recall N222375270, which is the number on the owner letter and the dealer paperwork.
Answered from the register this site holds. NHTSA is the record to act on.
Owners are told to park away from buildings: the wording the agency uses when a vehicle can catch fire with the ignition off.
affected
in the notice
caught
| Campaign | 23V266 |
|---|---|
| Filed by | General Motors, LLC |
| System at fault | Service Brakes, Hydraulic |
| Reported to NHTSA | 13 April 2023 |
| Model years | 2019-2023 |
| Vehicles named | CHEVROLET 4500HD, CHEVROLET 5500HD, CHEVROLET 6500HD |
This is not an ordinary campaign.
- Owners are told to park it outside, away from buildings: the wording used when a vehicle can catch fire while switched off and unattended.
What the notice says today
The consequence
An electrical short in the brake pressure switch can overheat the circuit and increase the risk of a fire while driving or parked.
The remedy
Owners are advised to park outside and away from structures until the recall repair is complete. Dealers will replace the master cylinder pressure sensor and inspect the wire harness, replacing it, if necessary, free of charge. Owner notification letters were mailed July 11, 2023. Owners may contact Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N222375270.
What it said before
This campaign is in the register but not yet in the dated wording archive, so we cannot yet say whether its text has moved. It enters the archive on the next pass.
This is one of 583 notices in the record whose component field names service brakes, hydraulic. Across that group the median wait before owners were written to was 37 days.
The models named here, across their whole recall history
- Chevrolet 4500hd recalls: 6 US campaigns
- Chevrolet 5500hd recalls: 6 US campaigns
- Chevrolet 6500hd recalls: 3 US campaigns
The recall record and its wording are published by the US National Highway Traffic Safety Administration and are US Government public domain. The dated archive, the comparison and any before-and-after above are CarsMultiverse. How fresh every engine behind this page is, is public on the status page. To check a specific vehicle, use NHTSA’s own VIN lookup.
Other General Motors notices we hold
- 26V530: 2024-2025 Chevrolet Silverado 2500 and GMC Sierra 2500
- 26V496: 2026 Chevrolet Silverado EV and GMC Sierra EV
- 26V494: 2026 Cadillac Escalade IQ, Escalade IQL, GMC Sierra EV, and Chevrolet Silverado EV
- 26V399: 2025-2026 Express, and 2025-2026 Savana
- 26V394: 2026-2027 Cadillac Vistiq
- 26V345: 2026 Chevrolet Express and GMC Savana
- 26V329: 2015 Cadillac Escalade, Escalade ESV, XTS, 2015-2016 Cadillac ATS, CTS, and SRX
- 26V325: 2018 Chevrolet Silverado 1500, GMC Sierra 1500, 2019 Chevrolet Silverado 2500, Silverado 3500, GMC Sierra 2500, and Sierra 3500
All 474 General Motors campaigns we hold · Every manufacturer in the record
The fingerprint of this notice
We take a SHA-256 of each of the three blocks of text the authority publishes and keep the first eight characters. As we last read campaign 23V266 on 5 September 2026, they were:
- Defect summary
782722bc - Consequence
e70ed60d - Remedy
f56ae04a
We first read this notice on 21 August 2026. It has not moved since. If it ever does, these characters will not match, and the change will be dated here.
The wording we hold for 23V266 · how the whole register is watched
This notice names one vehicle among several registers that have written about it. Every notice this site holds for the Chevrolet 4500hd, in all seven, is kept on that vehicle's own page, with the newest in each.
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Owners of these cars
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