Chevrolet, Cadillac, Buick Models Lose Brake Assist

NHTSA campaign 20V588000 · Reported Sep 24, 2020 · General Motors LLC

high How serious is it? About this label

Losing power brake assist means you would need much more pedal force to stop the vehicle, which increases the risk of a crash. The notice does not tell owners to stop driving.

Key facts

NHTSA campaign number	20V588000
Reported to NHTSA	Sep 24, 2020
Manufacturer	General Motors LLC
Part affected	Service Brakes
Vehicles covered	7 model/year combinations, model years 2020–2021
Do-not-drive advisory	No
Park-outside advisory	No
Repair	Free at any franchised dealer

What's wrong, in plain English

Contamination at a sensor connection in the electronic brake boost system may interrupt communication between the sensor and the brake booster. This affects certain Chevrolet Corvette and Trailblazer, Cadillac CT4, CT5 and XT4, and Buick Encore GX vehicles. If that happens, the power assist that helps you brake could be lost, meaning you would need much more pedal force to slow or stop the vehicle. Dealers will replace the electronic brake boost module, free of charge.

What you should do

1. Check your VIN at nhtsa.gov/recalls to confirm your vehicle is affected.
2. Contact your Chevrolet (1-800-630-2438), Cadillac (1-800-333-4223), or Buick (1-800-521-7300) dealer.
3. The repair is free.

Where do I find my VIN, and what do I tell the dealer?

Your VIN is the 17-character code on the lower left of the windshield, on your registration and usually on your insurance card. Enter it at nhtsa.gov/recalls to see whether this recall is still open on your car. When you call the dealer, say you have an open safety recall and give them NHTSA campaign number 20V588000. More in how recalls work.

Affected vehicles (7)

2020 Buick Encore GX
2020 Cadillac CT4
2020 Cadillac CT5
2020 Cadillac XT4
2020 Chevrolet Corvette
2021 Buick Encore GX
2021 Chevrolet Trailblazer

Who to contact

Buick — official Buick recall lookup

Customer service: 1-800-521-7300

Cadillac — official Cadillac recall lookup

Customer service: 1-800-458-8006

Chevrolet — official Chevrolet recall lookup

Customer service: 1-800-222-1020

Any franchised dealer for the brand can do the repair. Phone numbers are taken from manufacturer sites and recent NHTSA notices; if one has changed, the number in your own recall letter is the one to use.

Other Chevrolet Corvette recalls

Aug 21, 2025Chevrolet Corvette Fuel Leak Fire Riskcritical
Mar 20, 2025GM Cars: Electric Power Steering Assist May Failhigh
Jun 6, 2024Corvette Seat Belts May Lock Out of Reachmedium
Feb 17, 2022Chevrolet Corvette Rear Half-Shaft Missing Ball Bearingshigh
Jun 10, 2021GM vehicles' airbag warning light works inconsistentlymedium
Sep 24, 2020Chevrolet Corvette Driver Seat Belt May Not Lockhigh

All 10 Corvette recalls

Official notice

Component: SERVICE BRAKES
Summary: 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 system.
Safety risk: 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.
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.

Verify your specific vehicle by VIN at nhtsa.gov. Recall repairs are free of charge by law.