Recall 20V588 covers 3,677 2020-2021 Cadillac vehicles for electronic brake boost loss. Repair is free at any franchised Cadillac dealer.
Cadillac recall 20V588 covers 3,677 2020-2021 vehicles, including XT4, CT4, CT5, Corvette, Trailblazer, and Encore Gx models, because contamination in the electronic brake boost sensor connection can interrupt brake assist. If brake boost assist is lost, the driver needs extra pedal force to slow or stop; Cadillac dealers will repair the system free of charge.
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What's wrong?
The electronic brake boost module on the 2020-2021 XT4, CT4, Corvette, CT5, Trailblazer, and Encore Gx helps build braking force when you press the pedal. Instead of relying only on your foot pressure, the module uses sensors and electronics to add brake assist, so the vehicle stops with normal pedal effort.
On affected vehicles, contamination inside the connector for the rotor position sensor can interrupt communication with the brake boost system. That sensor tells the system where the electric motor is as it provides assist. If the connection degrades, the brake boost system can lose assist, and the driver has to press harder to slow or stop the vehicle.
If electronic brake boost assist is lost, a warning light and message can appear in the instrument panel, and vehicle speed can be limited. Treat those signs as a brake-system warning until the vehicle receives recall service.
Who's affected?
Covers Cadillac, Chevrolet, and Buick models from the 2020 and 2021 model years, all tied to the same brake system component.
| 2020 Cadillac XT4 | brake system |
|---|---|
| 2020 Cadillac CT4 | brake system |
| 2020 Chevrolet Corvette | brake system |
| 2020 Cadillac CT5 | brake system |
| 2021 Chevrolet Trailblazer | brake system |
| 2020 Buick Encore Gx | brake system |
| 2021 Buick Encore Gx | brake system |
| Units affected | 3,677 |
| Field incidents | NHTSA has logged no field incidents to date. |
A matching year and model does not confirm inclusion. Check your VIN to confirm whether this recall applies to your specific vehicle.
What's the safety risk?
Loss of electronic brake boost assist means the vehicle needs extra pedal force to slow or stop, increasing crash risk. A warning light and instrument panel message can appear, and vehicle speed can be limited. If those signs appear, drive cautiously, stop in a safe place, and call the dealer. Repair is free at any franchised Cadillac dealer.
What should I do?
- Check your VIN to confirm your 2020-2021 Cadillac XT4, CT4, Corvette, CT5, Trailblazer, or Encore Gx is included in this recall.
- Contact a franchised Cadillac dealer to schedule the free electronic brake boost module replacement that fixes the brake-assist communication fault.
- Bring the recall notice if GM mailed one. If not, reference recall number 20V588 when you call.
- Drive cautiously until the repair is complete. Leave extra following distance because the brake pedal can require more force to slow or stop the vehicle.
What happens at the repair
At the dealer, a Cadillac technician replaces the electronic brake boost module. The new module restores the brake boost system communication path covered by this recall, and parts and labor are free. Reimbursement is handled through warranty coverage rather than a separate recall reimbursement program because the covered vehicles were still under warranty. If you already paid for work tied to the electronic brake boost system, ask the Cadillac service desk how the vehicle warranty applies to that repair paperwork.
| Reimbursement | Warranty coverage applies |
|---|
Timeline
| September 24, 2020 | NHTSA published the recall |
|---|---|
| September 24, 2020 | Dealer notification began |
| September 24, 2020 | Dealer notification ended |
| December 9, 2020 | Owner notification mailed |
| December 9, 2020 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 20V588?
Recall 20V588 covers 3,677 2020-2021 Cadillac XT4, CT4, Corvette, CT5, Trailblazer, and Encore Gx vehicles with electronic brake boost sensor connection contamination. If communication is interrupted, brake boost assist is lost and extra pedal force is needed to stop. Cadillac dealers replace the electronic brake boost module for free.
What should I do if my 2020-2021 Cadillac XT4, CT4, Corvette, CT5, Trailblazer, or Encore Gx is on this recall?
Check your VIN to confirm your specific vehicle is included in recall 20V588. If it is, contact a franchised Cadillac dealer to schedule replacement of the electronic brake boost module. Reference recall number 20V588 and GM recall number A202307260 when you call.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the safety defect at no cost. For recall 20V588, Cadillac dealers replace the electronic brake boost module free of charge, including covered parts and labor.
What is the safety risk in recall 20V588?
The safety risk is reduced braking assist. If the electronic brake boost system loses sensor communication, the driver must press harder on the brake pedal to slow or stop the vehicle. That longer, harder stop increases crash risk until the free module replacement is complete.
What if I bought this vehicle used?
The free recall repair still applies. Recall coverage follows the VIN, not the first owner. Check your VIN to confirm whether your specific 2020-2021 Cadillac vehicle is included, then call a franchised Cadillac dealer with recall number 20V588.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/20V588000 |
|---|---|
| Cadillac customer service | 1-800-630-2438 |
| NHTSA recall # | 20V588 |
| NHTSA recall # (full) | 20V588000 |
Source documents
-
Download Recall Document (PDF) (PDF) - Download Quarterly Report (PDF)
- Download Recall Report (PDF)
- Download Misc. Document (PDF)
- Download Recall Document (PDF) (PDF)
- Download Recall Document (PDF) (PDF)
- Download Owner Notification Letter (PDF)
- Download Owner Notice (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 23, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →