Buick Encore Gx, Cadillac Ct4, Cadillac Ct5, Cadillac Xt4, Chevrolet Corvette, Chevrolet Trailblazer, model years 2020 to 2021. Filed by General Motors LLC and reported to NHTSA on 24 September 2020. 3,677 vehicles potentially affected.
What the notice says General Motors LLC (GM) is recalling certain 2020 Chevrolet Corvette and Cadillac CT4, CT5 and XT4, 2021 Chevrolet Trailblazer, and 2020-2021 Buick Encore GX vehicles. Sensor connection contamination in the electronic brake boost system may cause an interruption of communication between the sensor and the brake boost …
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: A202307260. That is the number on the owner letter and on the dealer paperwork. 20V588 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 20V588 cover?
- Buick Encore GX, Cadillac CT4, Cadillac CT5, Cadillac XT4, Chevrolet Corvette, Chevrolet Trailblazer, model years 2020-2021.
- What is wrong with them?
- General Motors LLC (GM) is recalling certain 2020 Chevrolet Corvette and Cadillac CT4, CT5 and XT4, 2021 Chevrolet Trailblazer, and 2020-2021 Buick Encore GX vehicles.
- What can happen if it is not put right?
- If communication with the sensor is interrupted, the electronic brake boost assist could be lost. Extra pedal force will be required to slow and stop the vehicle, increasing the risk of a crash.
- Is there a fix yet?
- Yes, and it is free. GM will notify owners, and dealers will replace the electronic brake boost module, free of charge. The recall began December 9, 2020. Owners may contact Chevrolet customer service at 1-800-630-2438, Cadillac customer service at 1-800-333-4223, or Buick customer service at 1-800-521-7300.
- 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 A202307260, 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.
What the authority says can happen if this is not fixed: “If communication with the sensor is interrupted, the electronic brake boost assist could be lost. Extra pedal force will be required to slow and stop the vehicle, increasing the risk of a crash.”
affected
in the notice
caught
| Campaign | 20V588 |
|---|---|
| Filed by | General Motors LLC |
| System at fault | Service Brakes |
| Reported to NHTSA | 24 September 2020 |
| Model years | 2020-2021 |
| Vehicles named | BUICK ENCORE GX, CADILLAC CT4, CADILLAC CT5, CADILLAC XT4, CHEVROLET CORVETTE, CHEVROLET TRAILBLAZER |
What the notice says today
The consequence
If communication with the sensor is interrupted, the electronic brake boost assist could be lost. Extra pedal force will be required to slow and stop the vehicle, increasing the risk of a crash.
The remedy
GM will notify owners, and dealers will replace the electronic brake boost module, free of charge. The recall began December 9, 2020. Owners may contact Chevrolet customer service at 1-800-630-2438, Cadillac customer service at 1-800-333-4223, or Buick customer service at 1-800-521-7300. GM's number for this recall is A202307260.
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 78 notices in the record whose component field names service brakes. Across that group the median wait before owners were written to was 39 days.
Last checked . No change has been recorded in the wording.
The models named here, across their whole recall history
- Buick Encore GX recalls: 3 US campaigns
- Cadillac CT4 recalls: 5 US campaigns
- Cadillac CT5 recalls: 6 US campaigns
- Cadillac XT4 recalls: 8 US campaigns
- Chevrolet Corvette recalls: 21 US campaigns
- Chevrolet Trailblazer recalls: 4 US campaigns
How to cite this record
Quoting the wording on this page means quoting a version, so the date belongs in the citation:
CarsMultiverse, recall 20V588, wording as read on 16 September 2026. https://carsmultiverse.com/recall/20v588/
The cross-border matches used on this site are deposited as a citable dataset: doi:10.5281/zenodo.22087136. The recall wording itself is published by the national authority named above and is theirs, not ours.
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 20V588 on 23 August 2026, they were:
- Defect summary
f8a17c75 - Consequence
bc685c28 - Remedy
40ff57a2
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 20V588 · 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 Trailblazer, in all seven, is kept on that vehicle's own page, with the newest in each.
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