There are 3 owner-reported brakes complaints for the 2019 GMC Yukonin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
Automatic emergency braking system deployed unexpectedly on acceleration from a traffic light stop. Vehicle was about 10-15 MPH and system operated with no brake pedal input. A vehicle behind had to do a panic stop to avoid collision. Deployment disengaged when accelerator pedal was released. My wife, principal driver, was in the car. She advised this had occurred two times before. No recalls are presently listed for the vehicle.
I JUST PURCHASED THIS 2019 GMC YUKON DENALI. ABOUT 3 WEEKS AFTER; THE MESSAGE "SERVICE TRAILER BRAKE SYSTEM" STARTED BEEPING...DIDN'T REALLY PAY BOTHER ME AT 1ST SINCE I WEREN'T PLANNING TO PULL ANYTHING. THEN IT STARTED DOING IT MORE FREQUENTLY. NOW IT IS CONSTANTLY DOING IT EVERY FEW DAYS. CAN'T SEEM TO GET IT TO STOP. VERY ANNOYING... ANY SUGGESTIONS?
BRAKE LIGHTS COMPLETELY STOPPED WORKING. CAR IS 1 YEAR OLD.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 26, 2026