Service Brakes Problems of GMC Yukon - part 2

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.

See all problems of the 2021 GMC Yukon 🔎.

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.

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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.

See all problems of the 2015 GMC Yukon 🔎.

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??.

See all problems of the 2016 GMC Yukon 🔎.

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.

[xxx] while driving on [xxx] myself and my family in our 2022 Yukon 6 lane highway 65 mph the engine lost power with no warning at all and left us with no power steering ,or brakes. This was in heavy traffic with other vehicles on our right and left side. I was able to put 4 way on and carefully move to the right lane and then barely to the burm. Vehicle would not restart and the sound of it was of rattle and groan. Yukon was towed to the nearest dealer and we were told it was a bad engine of either bearings or rods. We were very lucky to not having an accident and harm my family or other persons on the highway. When a new engine was installed it ran for ony 15 minutes and also was defective for the same issue. Vehicle was returned to us on 12/14/24 and we were denied any additional warranty. At this point I have no confidence in the vehicle or general motors. We took a financial loss when we traded the vehicle because of the major problems thru no fault of ours. The dealer would offer nothing as far as extending the warranty nor would GMC customer service that we filed a formal complaint # [xxx]. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2022 GMC Yukon 🔎.

The contact owns a 2019 GMC Yukon. The contact stated that while driving at 55 mph and approaching a red light, the brakes failed to operate upon depression of the brake pedal. The brake pedal had hardened as the contact steered the vehicle off the shoulder of the road. Due to the failure, the contact drove through the intersection and allowed the vehicle to coast to a complete stop. Upon restart of the engine, the "brake assist" warning message flashed on the instrument panel. The contact's husband was called to the scene of the incident and later drove the vehicle to an independent mechanic. The mechanic inspected the vehicle had discovered that the vacuum pump had failed. The vehicle was repaired by the mechanic. The dealer was notified of the failure and offered to inspect the vehicle; the dealer then referred the contact to the NHTSA hotline to file a safety complaint. The manufacturer was notified of the failure but offered no assistance. The failure mileage was approximately 131,600.

See all problems of the 2019 GMC Yukon 🔎.

When driving through eugene brakes suddenly got soft while at a stoplight, then pedal got stiff and very hard to keep pressed. An alert came on the dashboard 'brake assist service' just about the same time the brake pedal changed and car would not fully stay at a stop. When checking to feel what had just happened, by letting up and repressing the brakes, it would not fully stop car, even with all my strength pressing. If another car would have been coming through, my young son or myself could have been killed or seriously injured and I could cause someone seriously to be hurt or killed from being in their lane of travel. I alerted my husband that I was unable to drive the vehicle safely, he is in the vehicle industry and looked up online and found there is a common known problem, recalls, and service bulletins, but apparently not for vehicle years prior to 2017, although this severe failure is seen on 2014 and later; and the manual tests/diagnostics that a person can do in a pinch per the bulletin, recall notice, and articles; and in his trials of how to tell if it is a failure or fleeting problem - nothing alleviated it, all the symptoms are present and system is failing and continually bringing up the brake assist service alert. This is the info that we found on the recall, but didn't appear to cover 2016 year models: [NHTSA campaign number: 20v603. Gm's own number for this recall is n202300860. ] we plan to get this Yukon over to guaranty Chevrolet in junction city oregon tomorrow 10/8. The only thing that has been very recently noticeable preceding this in recent week or so is a slight uneven braking feeling in the motion of the car when coming to a stop. Which it has not done before.

Defective wire harness between 2 body control modules, causing alarm to go off repeatedly "service trailer brake system" and also "stabilitrack" will come on randomly and lock my brakes up and all of the features in my dash. This has been very scary to drive and has brought the vehicle close to collision more than a handful of times now.

We just purchased this vehicle from winegardner GMC in prince frederick, MD. On [xxx} on our drive home from the dealership, we kept hearing a terrible screeching/ clucking noise coming from the rear when we were braking or applying any pressure to the brake pedal. We instantly contacted the dealership and they had us bring the vehicle back the next morning for them to look at and to make the repairs but unfortunate for us. They do not have the parts in stock, so we have to take it back Tuesday, October 8 , 2024 at 8am and leave it for the day. Hoping it is repaired correctly with the new parts “both rear calipers” as I left the dealership, I was approximately 10 miles away and out of no where my dash displayed “service, trailer, brakes”, constantly along with a loud dinging noise for the rest of the drive home. I contacted the dealership and spoke with the service manager and informed him of the situation. He told me it has been an ongoing issue with gm for years and it’s electrical and because we purchased a used vehicle. It’s not covered to be repaired. We would have to pay out-of-pocket for it to be fixed. This is very upsetting because we just spent $40,000 on a used low mileage Yukon denali for our family to travel in, but it’s unsafe, because it affects the traction control, and abs brake system. I would also like to note that I did not have a trailer hooked to the vehicle, so I do not understand how that service indicator would appear unless it was cleared by the dealership during maryland state inspection. We have asked them several times for a copy of the maryland state inspection they performed, and we are getting the runaround. As the purchaser of a vehicle, it is all right to have that document, showing what past and what failed maryland inspection before being resold to us. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2018 GMC Yukon 🔎.

I have noticed the amount of pressure needed to apply brakes at a slow speed is a lot to where it seems like I will crash into the car or object in the way of my vehicle. I took my vehicle to a GMC dealership and was told the brake vacuum pump needs to be replaced. These vacuum pumps were already recalled by NHTSA. Nhtsa #19v645000, gm #n192268490. This recall was expanded to include additional vehicles. Nhtsa #20v603, gm #n202300860. I strongly believe my vehicle needs to be included in this recall. GMC repair invoice is attached.

My power vacuum brakes system is not properly working. In order to stop truck I must depress brake pedal very hard just to stop truck. Crunching noise every time. Made several trip to mechanic . I changed many part ( brakes) rotors , still and brake vacuum sensor ( purchase from GMC dealer . Still have this problem. Mechanic states, need new vacuum pump. Very dangerous to drive. Very difficult to stop . Please investigate this VIN for common complaints.

The contact owns a 2023 GMC Yukon. The contact received notification of NHTSA campaign number: 24v674000 (service brakes, hydraulic); however, the dealer refused to perform the recall repair because the vehicle had a salvage title. The contact stated that the dealer would repair the vehicle but only if he paid out-of-pocket for the repair. The contact stated that the dealer had exceeded their authority in declining to complete the recall repair. The manufacturer was not made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.

Transmission failure, hard shifting, slipping and loss of power also severe shuddering. Very dangerous driving. I had to have the transmission replaced after taking the vehicle to a dealership and upon verification from same dealership reproducing the transmission failure. Massive financial loss, dealership stated these transmissions are known to fail. Manufacturer has been notified by numerous complaints. Compensation is warranted.

I keep getting a warning on my display on dash about my trailer brake system is not working. Also my temperature gauge stops working and I have to take off negative cable on battery to reset it. Temperature control sensor has been replaced but the problem still continues to happen.

On [xxx] I brought my vehicle to rivard Buick GMC with a squeaking noise that was check and attempted to be repair four times at the same location. They provided a quote for $2,309. 10 stating it was the master cylinder. Rick the services director said it was not cover under warranty and it need it to be cover by me, at that point I explain to him the vehicle has been in and out of his services department for the same issue since it had 20,000 miles. 1st time-they replaced the front brake pad stating gm had a defect on them (noise went away for a few thousand miles) 2nd time- they apply conditioner to the brake and lubricant so they say (noise went away for a few thousand miles) 3rd time- they said it was not the front brakes anymore making the noise. They said warranty did not cover rear brakes due to gm not flagging it as defected pad. I complained the noise was coming from the front of the vehicle but they insisted it was the rear so I paid $500 plus to get the rear brakes at 60% life left on them. At the time of picking up the vehicle after repair completed the noise came back within a few miles from the dealer. I returned to the dealer and spoke with the services manager troy, he apologized for the inconvenience and said they will take care the front brake at no cost to me, however they submitted a claim to gm to get the work done and kept my money when they misdiagnosed the issue. 4th time- noise comes back at this point the warranty it's expired and they tell me it's the master cylinder the actual issue. When I talked to rick, he said that gm was willing to pay for half of the work and the other half it's my responsibility. On [xxx], my wife and three kids almost hit a wall while trying to stop and the braked did not work. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Driving back from las vegas for a family trip, traffic was heavy, a lot of stop-and go. I started to feel the brakes delay to stop. After a few minutes I was able to pick up a little speed and again traffic was built up. This time the brakes failed and got stiff. I had to slam on the brakes and practically stand up on the brakes in order for the car to stop. I barely avoided wrecking into the car in front of me. I was a few hours away from home and had to drive all the way with this problem. When I got home I took it in to the nearest dealer shop to get the brakes checked . I looked online and found out about the recall on the brakes.

While I’m parked or even driving I keep getting a alert on my speedometer ( trailer break system ) and it’s not a 1 time alert the whole time I’m driving it’s constantly alerting me yet I don’t even use my trailer system at all, it’s concerning due to the distraction of trying to clear the screen constantly while I’m on the high way.

The contact owns a 2015 GMC Yukon. The contact stated that while depressing the brake pedal, added pressure was needed before the vehicle came to a stop. The contact stated that the vehicle hesitated or jumped before coming to a stop. Additionally, the contact stated the transmission was slipping. The contact stated that while driving at various speeds, the vehicle stalled before self-correcting. The contact also stated that while idling at a stop light and attempting to accelerate, the vehicle hesitated, but gradually accelerated as needed. The contact stated that the rear taillight intermittently failed to illuminate. The contact stated that the check engine warning light was illuminated. The transmission fluid was flushed; however, the failure recurred. The vehicle was taken to the dealer who diagnosed the vehicle and determined that the transmission was fractured, and the light bulbs needed to be replaced. The transmission was not repaired or replaced. The headlights were not replaced. The dealer confirmed that the brakes were included in NHTSA campaign number 19v645000 (service brake, hydraulic) and the vehicle was repaired; however, the failure persisted. The vehicle was driven to the residence without further repairs. The contact stated that the vehicle had become inoperable. The manufacturer was not informed of the failure. The failure mileage was approximately 195,846.

The brakes are hard to push to come to a stop. I brought it to a mechanic and he said it was my vacuum pump. The air bag light comes on when you hit a hard bump in the road.

1. )rear brakes are not functioning properly. They still have pads but when you press down to pump the brake it fails. I was told by a mechanic that they other GMC vehicles have had recalls on this, but mine is not showing one. 2. )the suspension on this vehicle has never worked properly. It rides extremely rough. It has some special suspension in it from a shock perspective, but it feels as if it often fails. 3. ) I had to replace the torque converter in this vehicle last year, and the fluid that runs through it. Apparently this is a known issue with no recall. 4. ) the transmission slips when the vehicle shifts gears. It shifts hard. Also a known issue with no recall.

See all problems of the 2017 GMC Yukon 🔎.

My vehicles electronic stability control is activating randomly. This issue started a few years ago and has increased in frequency. We will be driving at speeds between 50-75 mph in dry conditions and it will randomly activate which has almost caused us to lose control of the vehicle. No mechanics have been able to figure it out. I did some research and saw there was a vehicle recall issued for 2019 GMC Yukons electrontronic stablilty control system, but for some reason it does not cover my vehicle. The gm recall number is n192261050. The description of the issue matches exactly what is happening. I called GMC and issued a complaint and also have setup a dealership to fix the issue. I don't believe I should be responsible for paying the cost of the repair since other 2019 GMC Yukons were recalled for this issue.

Stabilitrak warning light comes on intermittently. Cruise or anti-lock brakes do not work when this condition is present.

The vacuum pump seized causing the breaks to not work, brake assist not working code shows. The pump was replaced and after a week the same issue happened (vacuum pump seized) breaks are not working again.

Urgent appeal for investigation into braking capacity discrepancy dear national highway traffic safety administration (NHTSA),I am reaching out to bring a critical matter to your attention regarding the braking capacity of my diesel vehicle, which has not been adequately addressed despite multiple notifications to the service center. The primary concern I wish to highlight is the inadequate braking capacity of my diesel vehicle, which poses a significant safety risk. This concern is especially troubling when compared to my similar gas-fueled vehicle from the same manufacturer, which exhibits notably superior braking performance. After discussing this matter with the service center, their response was that the braking performance is considered normal for my diesel vehicle. However, the evident disparity in braking effectiveness between my diesel vehicle and the gas-fueled one suggests otherwise. This difference is particularly concerning given that both vehicles utilize the same brake system, despite the diesel vehicle's higher weight. In light of these circumstances, I urgently request NHTSA's intervention to investigate this matter promptly. The inadequate braking capacity of my diesel vehicle presents a tangible risk to road safety, affecting not only myself but potentially all drivers on the road. It is crucial that corrective measures are taken swiftly to address this issue and ensure the safety of all drivers. Your prompt attention to this matter is greatly appreciated. Thank you for your immediate action.

GMC is stating that due to a recall my brake booster vacuum pump failed and now they are that is is not covered and I will be out of pocket on the issue after numerous phone called with gm they are still of no help and the vehicle is not safe to drive which is my only means of transportation.

On several occasions, have noticed the brakes failed to operate properly when vehicle is at low speed. The pedal becomes extremely hard to push and there is almost no braking power. This has occurred in stop and go traffic and nearly caused an accident.

20221 GMC Yukon denali suddenly comes to a stop ,” it brakes hard “ it acts like when you are almost gonna hit someone and brakes engage so hard. Jerks everyone to the front !no other lights coming on or anything else! for now it’s been doing it at slow speed , really don’t wanna experience it at a high speed , pls help these vehicles are so expensive to be dealing with this . This is my wife and kids vehicle.

On January 21, 2024, my family and I went to lunch. As we proceeded to leave to return home when I pressed the brake the braking system, traction system, and forward collision systems all failed simultaneously, causing me to be unable to stop the vehicle which caused it to go through a stop sign while the brakes were fully depressed. Luckily, we were still in a parking lot, traveling only 5 mph. There was no oncoming traffic as we rolled through the stop sign. The following error messages displayed on the dash info screen brake system failure 43 mph top speed, forward collision system unavailable, service traction control, service brake pad monitor there was no warning from the display prior to trying to stop the vehicle that indicated there were any issues with the brakes. It wasn’t until I depressed the brake that I realized that the braking system was in total failure. After safely allowing the truck to roll to a stop, I turned the engine off, and then back on to see if that would reengage the brakes, but it did not resolve the issue. At that point I called an uber to take my family home and a tow truck to transport my vehicle to my local dealer, barker motor company. My fear is that this could have happened while we were on the highway traveling faster than 5mph in traffic, which could have been potentially fatal. After having my vehicle for a week to identify and repair the brake issue, was unable to identify the specific cause of the brake failure to repair and could not insure me that the brakes would not fail again. Instead, the technician replaced the battery in response to a low voltage code that showed in the dtc report. However, he could not provide an answer as to how that could have been connected to the total brake failure.

I was driving and n the freeway around 70 miles and " trailer brake service" message appears on the dash board screen we don't pulling nothing on that time and normally we don't use this car for pulling, the other message appears several times is very frustrating. I am the guy in charge for this vehicle.

My breaks stop working in drive through, pulling in parking spots, backing out, slow speed of traffic. I found out it's the power break vacuum pump. It then says service brakes on my dash when it occurs. This started about 2 weeks ago.

Breaking system engages at high-speed for no reason. Very scary incident breaking system engages at slow speed also for no reason.