2020 GMC Sierra 2500 brakes problems

Filed Oct 27, 2026 · Brakes · 201,000 miles · IL · fire

The contact owns a 2020 GMC Sierra 2500. The contact stated that while driving 65 MPH, there was a burning odor coming from the vehicle. The contact depressed the brake pedal, however, the vehicle failed to respond as needed. The vehicle was pulled over to the side of the road, coasted into a ditch, and went into a field before coming to a stop. After the vehicle came to a stop, the contact became aware that there was a fire behind every wheel, and the flames had spread to the grass. The fire was self-extinguished. The contact referenced the federal safety agency Campaign Number: 21V758000 (Service Brakes, Hydraulic); as the possible cause of the failure; however, the VIN was not included in the recall. The contact stated that the failure had previously occurred in 2023. The vehicle was towed to a tow yard. The failure mileage was 201,000.

Filed Dec 20, 2025 · Brakes, Driver assistance · IN

The main tailgate will not go down or function properly and it says online there is a national recall for this, but does not come up when I search my vehicle. When I turn on my left turn signal the brights flash for no reason and this is a known major issue with the vehicles as well. The trucks computer is telling me low on coolant even though it is not that has already been fixed through a 3rd pARTY WARRANTY Parking brake was stuck on when I bought the vehicle and had been for a long time you could tell and I had to pay over $1100 to fix it at GM. The Ford collision system does not work properly and the cameras will come on at certain times when they're not supposed to be and not come on when they are supposed to be

Filed Dec 4, 2024 · Brakes, Wheels · FL

Tires locking up while driving. NOT SAFE TO DRIVE

Filed Sep 20, 2024 · Brakes · CA

I have a 5th wheel with solar and my brake controler stops working periodically. I have a case# with gm 9-13676268071. I also hjave an extended warranty with gm and it's not covered due to my VIN# not being on a bullentin# 23-na-149. Gm also has a customer satisfaction progream # n232414840 and still won't cover it. This is a major safety item and concern for me.

Filed Aug 7, 2024 · Brakes · 62,000 miles · MI

The contact owns a 2020 GMC Sierra 2500. The contact stated that while driving 65 MPH, the message "Check Service Brakes Now" was displayed. The vehicle was taken to an independent mechanic, where it was diagnosed with electric parking brake malfunction. The mechanic informed the contact that the electric parking brake had been engaged unintendedly, causing the rear driver's side brake calipers to seize. The vehicle was repaired; however, the failure recurred on the rear passenger's side while driving. The vehicle was taken to the dealer, where it was diagnosed with electric parking brake circuitry failure. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 62,000.

Filed Mar 29, 2024 · Brakes, Driver assistance · MI

My vehicle inadvertently locks the rear tires at highway speeds and then releases and drives. In some instances it may brake several times causing the tires to burn rubber for a short distance causing rear traffic to either swerve to avoid rear ending me and in a couple instances causes the rear following traffic to abruptly change lanes to avoid rear ending me

Filed Mar 11, 2022 · Brakes, Electrical · LA

Service Trailer Brake System Alert constantly going off

Filed Jan 23, 2022 · Brakes, Electrical · KS

Truck has had multiple issues related to the electrical system and truck modules. It is my opinion that these are all related to voltage issues or module problems. i have had multiple infotainment issues with delays loading, freezing up etc. dealer has ran updates and checks with nothing found. In October around $35k miles the truck Radio would not work if i used the push button start. if i shut the truck off opened the door and let everything reset i could push the start button in the truck and the radio would work majority of the time. The next day i went out to a completely dead truck. I talked to my service department at the local dealer and they said i would need to bring it in but suggested i disconnect the batteries and recharge the batteries. after doing so everything started working correctly. it fixed my radio problem and never went dead again. since then i have experienced popping noises through the speakers when playing music occasionally. over the last few weeks i noticed the engine does not attempt to increase cold idle speed until i press the brake to put it in gear. January 22nd i hit the autostart button and it did not work. i started the truck and it had CEL, Traction control, park brake and wrench, lights on with service emissions, and power reduced messages displayed. Truck is running odd. codes present are (ENGINE GMLAN)P0118 - engine coolant temp circuit high voltage, (BRAKES GMLAN_ABS) U0401- invalid data from engine control module, P0562- system voltage low, (HVAC CONTROLS GMLAN_HVAC) B1325 - . control module power circuit. Truck is starting and charging fine. No connection issues at batteries. There are many TSB's and many complaints regarding similar issues. common brake and emissions faults with minor differences. Module failures, communication faults, and or electrical faults are likely causing all of these similar issues. they need to be categorized as the same failure group which will show GM has a bigger issue.

Filed Jun 17, 2021 · Brakes, Steering · FL

While driving my 2020 GMC 2500 Denali with the Duramax Diesel engine, the power assist for the steering and brakes failed without any warning. This made the truck nearly impossible to steer and stop. Luckily, I was able to avoid a collision and get the truck stopped in a safe location. The truck is currently being towed to Rivard GMC in Tampa, Fl. Doing an internet search, I found this problem has happened to others as well. Please ask GM to rectify this extremely dangerous defect.

Filed Feb 1, 2021 · Brakes · 1,000 miles · CA

Brakes since new squeeled. Took to dealer and dealer said it was normal. Have had the truck about 11 months now. Dealer stated gm now uses a different pad material and I would have to pay for it at a cost of close to $1,000 to replace the pads.