Service Brakes Problems of GMC Yukon - part 2

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.

See all problems of the 2017 GMC Yukon 🔎.

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.

See all problems of the 2015 GMC Yukon 🔎.

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.

See all problems of the 2025 GMC Yukon 🔎.

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).

See all problems of the 2023 GMC Yukon 🔎.

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.

See all problems of the 2016 GMC Yukon 🔎.

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 🔎.

There's alot of time while I'm driving in line going slowly and break pedal become hard and it will seem like the truck it's not stopping.

On February 14, 2025, my brakes went completely out in the school carline while picking up my youngest daughter. After the incident happened, I saw a light that read "service esc. " this private elementary school is next-door to a private high school. There were students, teachers, and parents walking in this area at this time. I had to maneuver through this carline and away from faculty, students, and parents with no breaks. No individual was injured or killed but it could have been a very serious accident. I called GMC asking for help but was told through a chat line to bring the vehicle in for service. I was finally able to get my Yukon to the service department where after a few days it was determined my brakes failed and they were replaced. One day after I received the vehicle back from service, there was a horrible noise while driving but no lights showed on the dashboard, so it was returned to the same service department. They found metal shavings in my oil and I was told the lifters had collapsed and the engine failed. At this time, I have not heard from GMC and my vehicle is still in the service department.

See all problems of the 2024 GMC Yukon 🔎.

Car shakes in drive, car shakes when accelerating, transmission issues, rear differential had to be replaced.

See all problems of the 2021 GMC Yukon 🔎.

This has been going on for a while now, but it’s getting worse overtime. If I push on my brakes more than twice the brake pedal locks up and I have to push extremely hard to get my vehicle stopped. . Luckily I have never been going fast and had to worry about this. This is normally when I am pulling into a parking spot or I am backing up that I have to tap on my brakes a few times. A couple of times I have bumped the pole in front of my parking spot due to not having brakes. I just put in a general date as to when they started to get worse.

I have a 2017 Yukon. There is a recall on this model already for a vacuum pump that decreases the power brake assist. My vehicle is having this exact issue. The back tire sounds like the compressor is always running and when braking it grinds at the pedal like a vibration and doesn’t want to stop immediately. I need my vehicle added to the recall list so I can get it repaired.

Good afternoon. Our rental car we picked up from the denver International airport on [xxx] had numerous incidents of emergent braking at highway and non highway speeds which were reported to sixt ( car rental) and documented on the dates in which they occurred, [xxx] (7-8 occurrences ) and [xxx] (3 occurrences-2 after a car wash). On the day in which the first occurrences happened, the car rental company representative from sixt, 3way connected me with a mechanic from annex who advised washing the vehicle to ensure the sensors were clean. I did proceed to wash the vehicle on 1. 25. 25. This same company, annex automotive, then evaluated the vehicle on 1. 29. 25 after emergency breaking occurrences continued of which [xxx] was the worst. On [xxx] there were no vehicles in front of or behind us nor to the sides of us and the roads were completely clear. It was also dark out. Attached you will find evaluation with validation there is a mechanical concern with the vehicle. On [xxx] the extremely unsafe occurrence of emergent braking occurred with skidding tires and the doors locking and unlocking at the same time occurred. This vehicle was completely unsafe to drive. I, as well as my passengers/family, are very lucky the road conditions were moderate on [xxx] and clear on [xxx], or these emergency breaking issues could have caused a serious accident. There were a total of five of us in the vehicle when all of these occurred. I am from minnesota and have a Yukon xl so I am comfortable with this vehicle this was the scariest vehicle experience I have ever encountered. The company did tow the vehicle on 1. 29. 25. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Transmission failed at 100,000 miles stalling vehicle brakes pushing back on me.

The contact owns a 2024 GMC Yukon. The contact stated that while a friend was driving at highway speeds, the vehicle suddenly experienced a loss of automotive power and stalled. The vehicle was towed to the local dealer who diagnosed that the engine had failed and needed to be replaced. No further information was available. Additionally, the vehicle had previously experienced a loss of braking while driving with the cruise control activated. The contact stated that while driving at a slower speed the vehicle lurched forward, striking a gate, and causing damage to the front pumper of the vehicle. The cause of the failure was not yet determined. The local dealer and manufacturer were notified of the failure. The contact was informed of the NHTSA action number: pe25001 (engine, engine and engine cooling). The contact stated that the vehicle had experienced the failure listed in the recall. The failure mileage was 16,000.

My brakes are not working properly. I can be backing up and put my foot on the brake. My truck will keep moving until I apply a lot of pressure on the brake pedal. I can be backing up and my truck will automatically brake and stop moving. I have to cut the truck off, start it back up for it to move. I was in a stand still traffic jam and braking a lot and my truck did stop it keep rolling. Sometimes when I apply the brake it slides. . This is the third time I have put it in the shop. I changed the brakes, brake sensor and replaced tires. I am scared to drive it. My truck is currently in the shop now for the brakes. Please help.

Roughly one to two times per day, a notification pops up on the infotainment screen stating that the brakes need to be serviced due to the brake assist system failing. The vehicle has been brought to 3 different dealerships and none of them know what the problem is, how to fix it, or whether it is safe to drive the vehicle still. The brakes seem to be working fine, however, it is concerning that even if the notification is safe to ignore, the brakes could indeed end up failing and the driver may not be aware due to receiving frequent brake failure notifications per day.

Since purchasing the vehicle in September with 8 miles there have been several electrical malfunctions. Some “fix” themselves when I restart the vehicle and several have needed to go into service. The first issue was when my mirrors wouldn’t come back up when switching to drive. I disabled the reverse tilt option and had it serviced to be fixed. Apparently it needed an update. More recently I had several malfunctions. My vehicle would lower its self while still in gear, and it wasn’t the normal self leveling. I didn’t not have any warning lights or messages pop up. The next time I started my vehicle and had “service rear axle” warning. I called the local dealership and after restarting the vehicle several times and more error messages, I decided to attempt to drive the vehicle in, all the while recovering several message warnings. On the way I was increasingly loosing brakes and I rolled into their parking lot with no breaks. Since this episode I have had repeated lost connection codes without dash warnings. They first attempted to reprogram the brake control monitor. Then when it continued to lower itself and have other malfunctions it went back into service. They replaced the serial data gateway and reprogrammed it. Since then the vehicle is having lost communication codes every day. It is currently in service to try and figure out what’s causing it and hopefully fix it.

I took my SUV (yukon slt 2023) to the GMC dealership 4/5 months ago because of 2 recalls, failed brake fluid leak detection and serial data gateway model. The car was repaired according to the dealership. About 2 weeks ago, I entered my garage to auto start my vehicle and my SUV would not auto start. I waited a few minutes and tried to start it again from inside the vehicle and it started. When it started, the engine light was on and on the dashboard, brake system failure was displaying. It was very strange. So, I let my vehicle idle for a couple of minutes and tried to move the car in the garage. The car started jerking when I put it in drive and a message displayed on the dashboard telling me not to drive my SUV over 40 mph. The brake system failure and engine light were still on. It was very strange. I parked my SUV and let it sit. I'm taking my SUV back to the dealership on Thursday. I'm thankful I wasn't on the highway traveling to work, who knows what could have happened. There are massive problems with these vehicles, brakes, engine, computer systems, etc. I do not feel safe driving my SUV. I drive 41 miles each way for work and I don't feel safe driving this vehicle now with all the recalls, including the engine.

I am the owner of a 2021 GMC Yukon denali with the 6. 2l v8 engine (VIN: [xxx] ). This vehicle has exhibited multiple serious issues affecting safety, drivability, and reliability. 1. Engine noise & oil consumption: since purchase, the vehicle has had a persistent loud knocking/tapping sound, especially under acceleration. The engine also consumes an excessive amount of oil between scheduled oil changes, with no visible leaks. I reported this to the dealership multiple times, but since there is no active recall or TSB, they refused to diagnose or repair the issue under warranty. I have since learned that many other 2021 Yukon denali owners with the same 6. 2l engine are experiencing similar issues and some have had repairs or engine replacements covered by gm. I have received no such support. 2. Braking problems: the vehicle has ongoing brake performance issues. Despite replacing the brake components multiple times, the brakes feel inconsistent and unsafe, especially during highway driving or sudden stops. There is vibration and uneven response, and the braking system does not inspire confidence. These problems have persisted despite attempts to correct them. 3. Suspension/handling concerns: the suspension feels unstable and loose, especially at highway speeds or when turning. The ride quality is poor, and there is noticeable sway and body roll, which creates discomfort and concern for vehicle control. 4. Fuel/propulsion system: the engine does not always respond smoothly to throttle input. I’ve noticed occasional hesitation or surging, which may be related to the previously mentioned oil consumption or fuel delivery. Again, the dealership has been unable or unwilling to resolve these issues without charging diagnostic fees. I’ve reported these issues to my local GMC dealer on multiple occasions, but no lasting solution has been provided, and I have not been able to afford expensive diagnostic costs out of pocket—especially for a vehicle of this price information redacted pursuant to the freedom of informatio.

The component that failed was the camshaft and lifters in the engine - my safety and others was put at risk because while going 45mph, I suddenly lost forward moving power and couldn't go faster than 35 - braking power was sketchy and only responsive when pumped. - I received the following errors on my dash "service esc" "service traction control", reduced acceleration drive with care", "forward collision system unavailable", "service emission system" the vehicle would shudder violently- this problem has been confirmed and corrected at a huge expense (see bill) -.

The contact owns a 2023 GMC Yukon xl. The contact stated that while driving 75 mph coming to an intersection and attempting to apply the brakes, the vehicle failed to stop as needed. The message brake system failure and speed limited to 62 mph were displayed on the instrument panel. The vehicle continued and drove through the intersection. The parking brake failed to stop the vehicle. The vehicle ended up stopping in a ditch and was towed to the dealer to be diagnosed. The contact was informed that the battery terminal had detached, causing 20 different modules to fail. The battery cable was tightened. The manufacturer was made aware of the failure and opened a case for a possible buyback. The manufacturer referred the contact to the NHTSA hotline to report the failure. The failure mileage was 25,100.

Trailer braking system warning is incessantly going off, without cause. Extremely distracting. No way to stop it. Truck has never even towed / trailored anything. Has happened multiple times over the last 6 months. Today occurred 26 times during driving.

This is a complaint for my vehicle Gmc2015 Yukon. My truck brake system(vacuum pump is defective). My large truck is a safety hazard on highway and street . When I attempted to park while depressing my brake pedal it instantly before very hard to press to stop my truck. I have to apply lot of force to my foot inorder to stop vehicle. My mechanic inspected vehicle and it show a bad (defective vacuum pump) . Base on former complaints about this same problem (2019 nhsta campaign number 19v645000 ) it show and state the exact problem with my vehicle. This problem started early last year. Also, when driving on highway and slows down,the brake vacuum pump and brake pedal locks up (very difficult to stop something). This happens intermitting times. Very scary trying to stop from crashing into cars in front of me sometime.

The contact owns a 2023 GMC Yukon. The contact stated that after starting the vehicle, the transmission shifter failed to shift from park. The contact stated that the "braking system", brake pad monitor, and traction control messages were displayed. The vehicle was towed to the local dealer. The cause of the failure was not yet determined. The vehicle was not repaired. The manufacturer was not yet contacted. The failure mileage was 44,871.

The car has all of a sudden had issues with the gas and breaking. When I press the gas, it stalls then rapidly accelerates. It has to be the transmission. Also, is making a noise and will barely drive when pressing on the gas. It does not accelerate!! could have easily gotten into a car accident! what is going on??.

There has always been break problems with this vehicle. Some recalls have been done. Now there is a new problem, I took it to the dealership. There is a special coverage to fix this issue. Gm denied to fix it because the special coverage expired on 06/06/2024. But the vehicle is under the miles and the problem just started.