Service Brakes Problems of GMC Yukon - part 2

The image module system has completely failed and never worked in the Yukon. Then it would brake while still accelerating.

See all problems of the 2025 GMC Yukon 🔎.

The vehicle is experiencing symptoms consistent with the brake vacuum pump failure described in gm special coverage adjustment n182202780, which applies to full-size gm suvs in this model range. The symptoms include a hard brake pedal upon startup, reduced brake assist, increased stopping distance, and audible vacuum or mechanical cycling noise when the vehicle powers on. This malfunction affects the vehicle’s braking performance and requires significantly increased pedal force, especially during initial operation or low-speed braking. This results in delayed braking response and reduced stopping capability, creating a safety hazard to occupants and others on the roadway. Although the symptoms match the defect described in the bulletin and the vehicle is within the published 10-year/150,000-mile coverage parameters, multiple authorized dealerships and gm corporate have refused to perform a diagnostic or repair because the VIN does not appear in their internal eligibility system. Gm customer care case number 82474826 documents these interactions. No diagnostic evaluation has occurred because the manufacturer and dealers declined to perform one unless the VIN is pre-flagged, regardless of symptoms. No warning lights or dashboard alerts accompanied the failure. The condition began gradually and has become more noticeable over time. I am concerned that other vehicles experiencing the same defect may also be excluded from inspection or repair due to VIN list limitations, despite meeting the published program criteria.

See all problems of the 2018 GMC Yukon 🔎.

I am writing as the owner of a new 2025 GMC Yukon xl at4 VIN: [xxx] , purchase date: 01aug2025, from elizabeth city GMC, elizabeth city, nc. This vehicle, equipped with the 3. 0l duramax diesel engine and super cruise hands-free driving assistance, was purchased for safe family travel, including space for my wife, our 21-year-old daughter, and our family dog(s). At approximately 4,300 miles—well within the 3-year/36,000-mile bumper-to-bumper warranty—this truck suffered a catastrophic right-rear brake failure directly attributable to a dealer-installed GMC-approved brembo performance brake upgrade package, resulting in a near-fatal highway incident and profound emotional hardship for my family. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

2023 Yukon denali xl 6. Gm oil change recall performed (October 2025) and GMC dealership noted no issues. Prior to recall oil change, at aprox 5k miles interval (45k total miles), check engine oil light on dash and was over 1 quart low. Next oil change at aprox 50k miles, no check engine light came on, but certified mechanic drained and measure oil level, 1. 5 quarts low. Engine often sounds odd at cold start, ticking sound. Now an oil change is $100 more, due to special oil, but not compensated for extra cost. Brake calibers failed. February 2026, engine light on, then off, then hood latch dash light warning now on and off. Huge safety concerns with the 2023 GMC Yukon 6. 2l.

See all problems of the 2023 GMC Yukon 🔎.

The contact owns a 2021 GMC Yukon. The contact stated while driving at an undisclosed speed, the engine seized. The brake pad sensor warning light illuminated. In addition, the contact stated that the vehicle continued to roll forward. The contact was able to drive the vehicle to the shoulder of the road. The contact stated while attempting to restart the vehicle, the vehicle failed to start. The contact stated that a nearby driver assisted by providing a jumpstart. The vehicle was driven to the residence. The vehicle was then taken to an independent mechanic where it was diagnosed with alternator failure. The contact stated that the vehicle was previously taken to two independent mechanics, and the vehicle was diagnosed with alternator failure. The dealer was made aware of the failure. The contact was informed that the failure was a known failure with similar vehicles. The manufacturer was made aware of the failure with the alternator and the brake pad sensor. The contact was informed that the repairs were not covered under warranty or recall. The failure mileage was approximately 95,000.

See all problems of the 2021 GMC Yukon 🔎.

At parking lot speeds, there have been many incedents of brake failure, when pressing pedal to stop pedal pulsates and becomes very hard to stop the Yukon. There seems to be a vacume or booster issue. Yukon will be fine for days then reaccure when slowing at stop sign or waitng at red light and moving foward in slow traffic to sign or llight and then in happens again. Scary and unreliable when using brakes at low speed intersections or continous stop and go's.

See all problems of the 2017 GMC Yukon 🔎.

Tthe dealer ship refused even talk to me.

Brakes failed to engage. Many lights lit up on dashboard and warning not to exceed 35 mph. It was determined this was due to a faulty brake system control module.

Keep quit working when I was driving , I just pick up from delearship for I another issue with on-star and is not part available is been there for over month not fix and now the brakes issue.

While driving in downtown boston in heavy traffic (stop and go) braking did not stop the vehicle when removing my foot from the brake and reapplying and the braking was extremely hard, the vehicle nearly collided into the vehicles in front of me. This issue persisted continously for the duration of travel. The issue was not found using the VIN provided. This issue must be resolved ASAP. This incident was not the first, after owning the vehicle for several months this issue is a major safety issues, specifically when my new young adult drivers use this vehicle. Please help me resolve.

See all problems of the 2015 GMC Yukon 🔎.

At low idle speeds like in a parking lot we almost hit another car because the brakes were very hard to press. No power brakes. Felt as I was having to stand on the brake pedal with both feet to stop my vehicle from hitting another car at a grocery store parking lot going 5 mph! a light flashes on and says”service brake assist “ light goes away and drives normal and brakes normal except when you get to a stop sign, or traffic light. This happens a few times and I’m not driving the car because of it because I might hit someone.

8/26/2025 I purchased the vehicle from maguire in syracuse, NY with open recalls. It is my understanding a dealership is required to have these fixed prior to selling a vehicle. I now have to drive 45 mins each way to get them fixed and miss additional 2 hours for wait time from work. Brakes could fail causing an accident.

I was driving down the highway, and my wife and I decided to stop at costco to get protein bars and gas for the drive home. We also had a [xxx] , [xxx] old, and [xxx] in the car. As we were approaching the end of the exit ramp at approximately 30 miles per hour, the engine jerked the car two or three times then died. When it died, I lost power steering and the car slammed to a stop. The car also displayed an alert about my tow breaking system. I tried to restart it, and smoke began rising from my engine bay. I stopped trying to restart, and got my family onto the hill beside the exit while waiting for a tow. The tech at the GMC dealer stated that the engine had seized on me while driving. The cam shaft can rotate a small amount one way before getting blocked, and likewise the other way. Tech believes that the bearing is responsible, but will not be doing a tear down until September 2. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2020 GMC Yukon 🔎.

The contact owns a 2025 GMC Yukon. While the contact's husband was driving at an undisclosed speed, the brake pedal was depressed; however, the vehicle failed to stop as intended. The contact stated that the brake failure warning light was illuminated. The contact’s husband depressed the brake pedal and noticed that the brake pedal was firm and difficult to depress. The contact stated that an error message indicated that the vehicle was decelerating. The contact's husband depressed the brake pedal and the vehicle decelerated to 40 mph. While the contact’s husband was slowly driving into the driveway at the residence, the brake pedal was depressed; however, the vehicle failed to stop. The contact’s husband immediately shifted the gear shifter into park(p) to stop the vehicle. The contact stated that the failure had occurred while on the way home from a family trip. The vehicle was towed to the dealer and the vehicle was diagnosed with a failed brake master cylinder assembly, a failed brake control module, and a failed brake plunger. The contact was informed that the brake master cylinder assembly, the brake control module, and the brake plunger needed to be replaced. The vehicle was not repaired. The contact was informed that the parts were on back-order. The manufacturer was not made aware of the failure. The failure mileage was approximately 3,150.

So the shock strut system up front has a grommet that holds it in. The repair order said they put a shock simulator in the car and it gave false reading saying it was good and it came out broke break line and caused me to jump a curve to stop the vehicle. Also now the the tail light is out and no way to repair it no one has the light. Also this car is on its third transmission.

No warning while exiting, I was able to hit the brakes. Then, when I reached for the brakes again, it didn’t break. There was no signals on the car. The car is total damage air bags came out.

See all problems of the 2002 GMC Yukon 🔎.

The passenger-side frontal airbag inflators, the determination was made that the propellant in these inflators may degrade after long-term exposure to high humidity and temperature cycling, which could cause the inflator to rupture during a deployment.

See all problems of the 2008 GMC Yukon 🔎.

1.     first incident while driving, the brakes failed and the entire infotainment/tablet system locked up. This presented a severe safety risk to my family and others on the road. The vehicle had to be towed to dealer where I was told that “no problems were found. ” I documented the incident with photos and videos showing the warning messages and system status.     2.     second incident approximately one week ago, after shutting off the vehicle, a “steering wheel lock” warning appeared and the truck became completely disabled. Even with jumper cables, it would not start. The vehicle had to be flatbed towed to dealer. I again documented the incident with photos and videos showing the warnings.

My vehicle’s engine failed for the second time while driving on the road. The first time a few months ago while my wife was driving. The engine failed and brakes failed. Fortunately she was on a back road a coasted to a stop. Car was towed to dealership. They said there was no problem. Received recall letter about a month ago outlining this issue. Yesterday, [xxx], I was driving with my daughter and the car stopped again while driving. I was in traffic and narrowly missed an accident. Gwinnett county police came to the scene and towed the vehicle to the dealership. I am not sure if the female officer made a report. But she requested the tow truck because I was blocking traffic. We often drive on the highway for work commutes. This could have happened and anyone in my family could have been fatally injured. I would like GMC purchase this vehicle back or replace with a safer model comparable or better. The service department called me this morning from jim ellis GMC in buford, georgia 678-902-8677, 3600 buford drive 30519. I was told that there is no recall for my truck. He told me that there is a safety investigation for a recall. I told him I can bring the letter. He decline. I asked for a courtesy vehicle. He said no, he would have to make a report and it would be up to 48 hours. Once it’s reviewed , then I could go to enterprise car rental to pick up a car. Maybe. The first time rick hendrick GMC duluth , GA 470-822-3779, 3344 commerce Ave, duluth, GA had my truck for about 2 weeks. No fix. No courtesy vehicle or rental. Now I’m without my vehicle for unlimited time. The jim elis tech, did acknowledge that there is no fix for what is going on. The local GMC dealers are not making this easy or putting the safety of its customers as a priority. These trucks are not safe on the road. This truck cost nearly $100,000 and it is not safe to drive. GMC has a record of the 1st service incident and this latest just happened yesterday. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(.

I have repair the trailer brake system warning light prior. Now again this faulty wiring module is constantly dinging and flashing warning messages while driving. It's very distracting and irrelevant considering I not towing anything. It covers the speedometer and is a complete nuisance.

See all problems of the 2016 GMC Yukon 🔎.

My vehicle is supposed to have a sensor wire for a break master cylinder and it doesn’t.

See all problems of the 2004 GMC Yukon 🔎.

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?.

See all problems of the 2019 GMC Yukon 🔎.

Yukon break tail lamp problems. Brake lights work intermittently. Very dangerous! the break lights will work intermittently and then work. This was an issue with the 2016 models and gm issues a recall. There is no recall for 2017 which I don't understand because nothing has changed with the manufacturing process. I researched and there is a class action but in California only.

I purchased a 2015 GMC Yukon in March 2024 I drive the vehicle 9 mons, 7500 miles the vehicle has been in service at my local dealership since Dec 13, 2024, for engine and transmission replacement, I have had the vehicle back 3 weeks not the warning light and service warning chime for the "service trailer brake system is on, I have not ever use a trailer with the vehicle, I was told the vehicle needs a wire harness, I have read this a problem in these vehicles that has not been addressed GMC with a recall, I have put a lot of money in the vehicle. This is an well documented failure in the trailer brake system that gm should repair at no cost to the consumer.

We purchased a brand new 2025 GMC Yukon on 5/19 and on 5/22, the vehicle would not release the parking brake. Multiple sensors / alerts were displayed, brake assist failure, press hard to brake, speed limited, service esc, service traction control, check engine light, brake park, service abs brakes. Vehicle was not drivable. Towed to marhofer GMC, problem was replicated next day. Was informed that brake booster and master cylinder were bad, however on a national back order. We are now 3 weeks out, without a repair completed or parts. Was also informed by dealer that there is a service bulletin out on this vehicle. Vehicle has 170 miles.

I was driving on a highway with my [xxx] son and 2 dogs when without any warning the vehicle just stopped and completely went dead. I was unable to turn on the hazards so I called 911, the police came within minutes and surrounded the vehicle to keep us from being crashed into. The brakes failed to work, the hazard lights would not work, the doors would not open other than the driver door. The police had to help remove my child and 2 dogs from the vehicle through the driver door. The vehicle could not be put into neutral so the police had to tow the vehicle from the middle of the highway. The result could have been deadly. The vehicle was completely dead with absolutely no function. After the police towed it to the police tow facility it was then towed to the GMC dealership I purchased the vehicle from. The dealership is jim curly GMC in keyport NJ. The dealership has had the vehicle since Saturday and is claiming to not know what is wrong with the vehicle. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

My wife was driving in the vehicle with our two (2) infants on dixie hwy in boca raton, FL when the breaks suddenly stopped working. Fortunately, there was not a lot of traffic on the road at this time and eventually the vehicle slowed down and no one was injured. No warning lights came on. Once the car came to a complete stop my wife turned off the vehicle and started it back up; still no warning lights or anything. My wife drove a little further to get to a safer location (not in the middle of the road), unfortunately the car then completely stopped working and my wife was still stuck in the middle of the road. . . Eventually a police officer (crash inspector) came to the scene and the car was towed to the dealership for repairs.

Engine light keeps appearing and when checked it shows catalytic converter needs replaces and its sensors need replaced. Brake light has short in it and I repaireable.

I jumped in and turned the car on and started driving. Right away I noticed most of the warning lights were on. The first speed bump in the complex made me realize I had lost 80-90% of my brakes as if I had a broken brake line for example and steering was a little hard and pulling a bit to one side. I check underneath I did not have any leaks. I decided to take it to the dealer to have it checked. Dealer said they were not able to find anything and cleared the codes. Dash lights check engine lane depart drive assist abs brake.

See all problems of the 2022 GMC Yukon 🔎.

I am filing a complaint regarding a serious safety issue with my 2017 GMC Yukon xl related to the brake vacuum pump. According to recall information (NHTSA recall n192268490), certain 2015-2017 GMC Yukon and Yukon xl vehicles are equipped with a defective vacuum pump that may decrease in output over time. This defect reduces power brake assist, resulting in increased braking effort, a hard brake pedal, and extended stopping distances. These conditions significantly increase the risk of a crash. I have experienced symptoms consistent with this issue, including vibrating brake pedal with no slippage, a hard pedal, ticking noises from the engine, a 'service brake assist' warning message, and difficulty braking. This issues usually occur under 10 mph. These problems compromise the vehicle’s braking performance and pose a direct threat to the safety of myself, my passengers, and other road users.

Brake pedal gets hard and will not allow vehicle to stop. Intermittent issue, but caused vehicle to hit gate. Same situation occurred later that same week and vehicle almost rolled through major highway crossing.

The pump in the power-assist brakes puts out less vacuum power than needed, increasing stopping distance and the risk of a crash. My car rolls and doesn't stop. I have new brakes so this is unacceptable!!.

Brake vacuum pump faulty again.

On two occasions while driving at low speed, my vehicle braked on its on a pulled hard to the left; the stabilitrac indicator also popped on briefly. I went online to determine if there were any recalls on my vehicle and found that one of the recalls on the 2016 Yukon was the exact issue happening with my vehicle. I checked my VIN and found that my vehicle was not one of the vehicles with this issue. I called gm to see if my vehicle had just not been published yet. I explain the situation too the customer service person; she understood my situation and informed me that until my specific VIN in identified with this issue, there's nothing that can be done. I'm thinking that until an accident happen because of this issue, there is nothing that can be done. I read that my issue was a problem with the ebcm, which needs to be reprogrammed. I thank you for any assistance with this issue.

This is the 3rd Yukon I have owned all 2001-2003. Every one of them have had serious brake issues, abs illuminated, parking brake does not work, and light is illuminated, brake fluid everywhere, which when hot starts eating away at electrical components, or in my case at cooling system hoses. Which all lead too one issue after another. I really think that this shoudl be address becasue eveyone I speak with has the same issue. It's exhausting anf expensive too fix, but I have no choice becausei need 3 rows too fit all my children and cannot afford a brand new car.

See all problems of the 2001 GMC Yukon 🔎.