Service Brakes Problems of GMC Sierra 1500 - part 2

Engine has seized twice, completely shutting down without electrical power or brakes. The vehicle also shut down in an intersection (no power, brakes, flashers). I was able to pull to the side on the 2 engine seizures but not during the electrical shutdown at the intersection in the turn lane. The engine was replaced the first time by quality GMC in albuquerque, nm. The 2nd engine is being replaced by diamond GMC in palmdale, CA. Warning lamps on the 1st engine seizure was tire pressure warning. The electrical shutdown was forward collision warning, emergency braking, etc. The 2nd engine seizure said something about engine needed to be restarted.

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I was driving about 45 mph when the vehicle started to brake on its own. Message center said "brake failure max speed 62 mph". I had to move the vehicle, so I continued forward. It was still trying to self-brake, I decided to stop and turn ignition off so computers could re-set but I had no brakes. I had to stand on brake pedal to get it stopped. Turned ignition off and restarted. The problem was gone, but it happened again 2 weeks later. Took to dealership where purchased and they said it needed a computed recalibration. Something I didn't know about. They charged me $200 to recalibrate the computer. My issue is the danger of not having brakes, not the $200. How many similar vehicles could this happen to?.

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Recently when starting truck brake message alert comes across on dash reading brake error, and not to drive above 45 miles per hour and brakes are not totally operational, meaning brake pedal has alot of play in it to bring truck to a stop. Have to turn off vehicle , sometimes repeatedly before it apparently resets computer system. This has now occurred four times in last five months. Events and dash warning message very similar to recall issued 3/3/20, but listed as "complete" on recall data base. Need to seriously and immediately looked into and corrected!.

On March 10, 2025, I was driving down a residential street, about 40 mph, when the "brake system failure, 42 miles top speed," indicator light came on. Seconds later, I was approaching a stop sign and pressed down on the brake pedal. The brakes failed and the brake pedal went directly down to the floor. Luckily there were no other vehicles around and I was able to coast through the stop sign. I continued to coast until the truck stopped on its own and I was able to shift the gear into park. I've checked for recalls on my truck for this issue and did not find any. There is a similar issue with the GMC 2500 and 3500 series. Perhaps the issue is broader than expected.

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The brake system failed in a parking lot three times within a month. It’s related to the special policy and recall regarding the vacuum and the loss of brakes at slower speeds and in reverse. The first two accidents were very minor creating no damage. The third one was at 10mph when I lost my brakes and crashed into a concrete barrier in a parking structure causing significant damage to my truck. I did not get injured but I have a wife and two kids that I am so grateful were not in the truck for the third one with major damage. With that being said my son was in the truck the second time it happened when I crashed into a parked vehicle in a parking lot because I was unable to stop which made me very frustrated and worried for my families safety in my truck. The first accident was in a parking lot where I was backing up and lost the brakes and crashed into a building which is my veterinary office causing damage to the building. Therefore after the first crash due to this issue I have decided that driving with my family in the truck is not an option anymore. It is very disappointing that a truck I purchased for the functionality and safety of having my wife and kids in it is no longer safe for passengers or myself in it. This problem is very reproducible and is a major concern for my family and my safety. It was towed to a GMC dealership in waukesha and is being inspected and they have stated it is reproducible. No warning lamps or messages were indicated for this issue. The truck will next need to get towed to crash champions auto body repair to ultimately get repaired which will take another month. All of this is a major inconvenience as I am a full time firefighter and in paramedic school as well. Not having a reliable safe vehicle for an extended period of time has caused great stress and inconvenience to my family. I’m hoping and praying that something can be done about this quickly and promptly to make this right. Thank you.

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Ok I know my VIN don't go under the 10 recalls for 2019 GMC sierra limited 1500 rwd, but my truck has the same problem with the brake module has those recalls I feel like GMC might have used different parts for the other recall but used the same brake module for my truck cause I have that same problem has the recall. It's obviously a issue that needs to be look in and my brake module should be fixed by GMC.

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Ebcm software update errors.

I was slowing down in a parking lot to park. I applied the brake and the pedal was very stiff and the vehicle wound not stop. I finally stood on the pedal and it acted as though the antilock activated and started shuttering. It finally stopped without damage. A warning of service brake assist displayed on the dash. This began to happen about 3 months ago intermittently, but now is a more frequent action. I have not taken it to the dealer and thought of replacing the brake vacuum pump but don't know what to do. Any assistance you can provide will be greatly appreciated. Thank you and have a great day! [xxx] information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

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Below 10,000 miles my truck had the master brake cylinder to put which they repaired under warranty. At about 89,000 miles the engine went out stating a misfire on cylinder 2. After talking with gm the vehicle needed all the rods and cam shaft replaced which was almost an $11k repair of which I had to pay almost $5k. The truck still has sporadic shakes while at idle. Many other owners have complained of the same issues. It’s hard to understand that a new truck would have so many issues. The truck was also sold without the chip to heat the seats or the heated steering wheel. These were down afterwards one of them about a year after purchase. We feel GMC should have paid for this repair given all their engine issues. They changed the warranty from 100k miles to 60k miles because they knew these engines have major issues.

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I was traveling north on interstate 95 and approaching my exit ramp. I was initially in the inside lane of travel. I accelerated to merge into the outside lane, between two other vehicles, and then onto the exit ramp. Once on the exit ramp, I let off of the throttle and the engine suddenly shut down. I noticed a message on driver information center instructing me to shift the vehicle into neutral and press "start again". The engine had shut down without any warning whatsoever. I complied with the instructions to no avail. The truck is over half full of fuel. I was within an hour of home after completing an approximately 8 hour, 500 mile, round trip over 2 days of driving. After this event, I connected an obd2 scanner and the only code found was p25a2 brake system control module. I placed the truck in park and tried repeatedly to start the engine. It would not turn over, crank or start. I had power to all systems and no other codes. I had to have the truck towed from the scene. The truck's performance had previously been flawless during this entire trip and had given me no warning whatsoever of the sudden engine shutdown. This is extremely dangerous and a safety concern.

Vehicle shifting poorly, and I have had a bunch of brake and rotor issues.

The contact owns a 2018 GMC Sierra 1500. The contact stated that while depressing the brake pedal, the brake pedal displayed more resistance than expected, causing the contact to have to apply more pressure while depressing the brake pedal. The contact stated that the braking distance was extended due to the failure. The vehicle was taken to the dealer who diagnosed that the brake vacuum pump had failed and needed to be replaced. The vehicle was not repaired. The contact became aware of NHTSA campaign number: 19v645000 (service brakes, hydraulic); however, the VIN was not included. The manufacturer was informed of the failure and confirmed that the VIN was not included in the recall. The manufacturer referred the contact to the NHTSA hotline to report the failure. The failure mileage was approximately 75,000.

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-transmission valve body failure, wheel lock up, abs event, loud bang and a flashing "d" on driver information center (dic) when lightly or moderately accelerating forcing an 8-7 or 8-6 downshift -when all four tires lock up at a high rate of speed, this puts the driver, the passengers, and all others on the road at risk for injury or death. -yes, the problem has been found in a document by my local dealer that this issue was added to my exact vehicle's service manual on 11/27/24. The document describes in detail the exact scenario I have been involved in multiple times. It is deemed as #21-na-275. It locks up the tires randomly to the vehicle in mid acceleration at any speed including 80 miles per hour in one instance for me. -yes, the dealership inspected it and found the issue to correlate with the newly added section to the service manual, 13333166. This document id is 5925530 and the added information to the dealership is #21-na-275. The GMC manufacturer has been contacted as of 3pm mst 3/14/25. Insurance doesn't deal with mechanical problems. The police will only be involved when there is death or injury. -no. The only warning that happens is simultaneously as the vehicle locks up the tires causing the driver (me) to inevitably try to save myself and others, swerving and trying to focus on not hurting myself or others but I did notice the "d" flash on one of these occasions. This is the most dangerous issue with a vehicle I have ever even considered. At any time, for any reason, all four tires can lock up at any rate of speed and cause multiple casualties. The way to fix this is to spend $3,000 which I am sure many people like myself do not have. This means there are thousands of these exact make and models of vehicles on the road right now. Please do not take this lightly as I have almost crashed multiple times with people in my vehicle due to no fault of my own.

Vehicle was having trouble accelerating, like the parking brake was on. Then received a message that the brake system failed, lane assist failed, and I couldn’t drive faster than 43 mph. Then a message about the trailer brake appeared.

Upon applying brake pedal at low speeds the brake is hard to depress and "choppy" in reacting. This seems same as n192268490 increased brake pedal effort yet the GMC denali is not apparently in the recall. This has happened on several occassions.

On a normal trip to work the dash light lit up then gave me these warnings. Service esc, service trailer brake, brake system failure-62 mph top speed, steering assist reduced. Dashboard lights that were on, abs check engine, brake, traction control. When I tried to slow down the power assist was gone on the brakes, I had a little braking when I pushed the pedal all the way to the floor as hard as I could, when I went to turn the wheel was hard to turn. I have had no issues like this before. After I managed to stop and turn off then on the vehicle everything came back expect for a warning to service the trailer brakes and the check engine light was still on. It all cleared after a few more restarts. I got the truck to the dealer 4 days later and they said it was the battery going bad even though I was not having any problem starting the vehicle, I had them replace the battery. I am unsure if the problem is resolved, time will tell. What I am sure of is if my daughter had been driving the truck, she would not have had the strength to get the brakes to work or turn the wheel, she would have had a accident for sure.

The vehicle has no power assist when at low rpms and is a hazard that may cause an accident.

Brake monitor repair keeps illuminating since 2/1/2025! replaced all brakes and rotors, yesterday 4/27/2025. Now don't drive over 43 mph illuminates, emergency brake illuminates says push brake peddle to disengage parking brake yet parking brake has never been engaged.

The system that failed was the wire harness for the internal brake control. This is a well documented problem on youtube and reddit. I was driving home from the mountains, with my 7k lb camper, and I started receiving incessant messages alternating between "trailer brakes disconnected" and "trailer brakes connected". The messages made it impossible to see the speedometer and hear music or calls. Most importantly, I lost my trailer brakes in the mountains of north carolina. Meaning the only way I could slow down was with my truck brakes, while a 7,000 lb camper was pushing me. I took my truck to the dealership today and paid $166 for a diagnostic. The stated the issue was with my camper. I tried to explain that many owners were having this problem and it is well documented. They stated there was no recall on my vehicle and gave me a print out of what to check on my camper. I checked my camper and there are no issues and no issues when I connect it to my other vehicle.

The contact owns a 2019 GMC Sierra 1500. The contact stated while driving approximately 20 mph, the vehicle came to a screeching stop. There were no warning lights illuminated. The vehicle was towed to the local dealer, where it was diagnosed that the electronic brake control module had short-circuited and there was a miscommunication, which engaged the parking brake and locked up the rear wheels. The vehicle was not repaired. The vehicle was previously taken to the same dealer on two occasions and repaired under NHTSA campaign number: 19v889000 (service brakes, hydraulic, service brakes, electronic stability control (esc); however, the failure recurred. The manufacturer was contacted and opened a case, but no additional assistance was provided. The failure mileage was approximately 7,000.

I purchased my 2022 GMC sierra XLT in February of 2022. I have had it in the shop 4 times for recalls. They couldn’t or didn't put an inspection sticker on the truck because I honestly don’t think it could have passed inspection. The truck sounds like a truck on transformer when I turn it off breaking town like a robot. On yesterday which was 1/27/2025 while backing up to turn around the truck started dragging in the back like the breaks locking up, the same thing happened while turning into my driveway off a state highway with an 18 wheeler coming. GMC can’t look at the truck until February 10! this truck was purchased new and it’s been nothing but trouble. Electrical system goes in and out steering assist reduced drive with care, engine power reduced, park assist on then off and truck making unusual noise. I waited 13 years to finally get another brand new vehicle and this what I ended up with. My last new vehicle was a 2004 Honda pilot. I had 459,000 miles on the truck no engine or transmission issues. I donated the truck to goodwill. Therefore, I hope GMC understands my frustration when my daughter’s 2019 kia optima is out performing my 2022 GMC XLT truck. The back breaks are dragging and locking up, it appears the gears are getting stuck and I can’t back the truck up or go in reverse without the struck staying stuck, then jerking vigorously and problems with the wheel turning to the right the truck get stuck or stall!.

We have had several times where we are on highway and our truck like slams on the brakes causing us to lose control. It was a recall on it and GMC fixed it and within the same week of them fixing it it happened 3 times back to back. Making my truck to force another car to steer out of my way and actually went off the highway. Thank god it was just dirt snd he didn’t get hurt or anything. But I am scared to even drive my vehicle! it starting happening for about a year now. And it would only do it like every couple months but now it’s has done it 6 times in the last 2 months!.

Brakes at low speed do not work well, causing extended braking distance. Looks to be a previous vacuum brake pump issue, but is no recall on it now.

The contact owns a 2023 GMC Sierra 1500. The contact stated that while driving on the highway at 75 mph, all of the warning lights on the instrument panel had illuminated, the contact depressed the brakes and the vehicle would not brake in a panic the contact quickly steered into the left lane, pumped the brakes frantically, and the vehicle was finally able to come to a stop. The vehicle was taken to a local dealer where the vehicle was diagnosed, the contact was advised that the failure experienced was due to a faulty battery and that it would need to be replaced. The vehicle was repaired. The manufacturer was notified of the failure. The approximate failure mileage 28,550.

"NHTSA campaign: 19v645000 as the vacuum level drops, the brake assist decreases, increasing braking effort, extending the distance required to stop the vehicle, thereby increasing the risk of a crash. " our vehicle was serviced and repaired for this problem under the recall on 9/6/2019, however, it is now happening again. Is there a second recall for this problem, and/or what can be done to remedy the defective equipment?.

The contact owns a 2014 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the brake pedal was depressed; however, the vehicle failed to stop as intended. No warning lights were illuminated. The contact stated that the brake pedal was depressed to the floorboard. The failure also persisted while driving downhill. The vehicle was taken to an independent mechanic. The contact was provided information for NHTSA campaign number: 19v645000 (service brakes, hydraulic). The vehicle was taken to the dealer; however, the vehicle was not diagnosed or repaired. The contact was informed that the manufacturer had closed the warranty, because the vehicle exceeded 100,000 miles. The manufacturer was not made aware of the failure. The failure mileage was approximately 156,000.

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This vehicle has the same issue as other recalled GMC sierra vehicles - the brake booster pump is failing, causing braking difficulty, particularly at low rpm and after repeated presses of the brake pedal.

While driving on the highway a message came up stating brake system failure, top speed 62 mph. It also came up with other error messages, like service traction control. I completely lost any braking capability and had to let it slow down & pull off to the side of the highway. I shutoff the vehicle and then restarted it & everything seemed fine. I took it to the dealership right away, where they said it had about 20 communication codes across different systems. After 3 days of them having it, they have no idea what is going on. They are now test driving my truck to see if they can get it to happen again (which could kill someone if it does happen again).

I was backing my boat down the ramp and the brakes were giving out. I know this was a recall issue, in the past, that I had repaired. Clearly, they repaired it with the same faulty part because it has happened again. When I took it to be repaired they said I had to pay for it this time. The issue wasn't resolved but only deferred until later, with a temporary fix. I could have ended up in the river and drowned. Paying the dealership to fix a safety issue caused by their defective parts is ridiculous.

I've had problems with the brakes for several years, the pedal is very hard at low speed. I've seen a recall but not on my car???.

Intermittently with slow driving such as parking maneuvers or creeping slow traffic at stop lights the brake pedal becomes very soft and depresses much more than normal and the brake action is decreased. Sometimes with this soft pedal it sounds like abs is engaging. Pumping pedal sometimes restores brake performance.

My pickup was specifically purchased to pull a duel axle trailer ( brakes required by FL. Law). The trailer weights more than the pick up. They stopped working with the electric /hydrolic trailer brake system. I have had the sierra in three times for warren ty repair. They never fixed the system. I have thoroughly test the trailer system - it works fine with another pickup. Dealer won’t return my calls. Multiple trips taking it in for this problem. Have a case filed with gm. All just placating me, now ignoring my problem. I am stuck and they are not acting in good faith.

I am writing to express my significant concerns regarding the recurring issues with my 2024 denali 6. 2, which has been subject to multiple service visits since reaching 7,000 miles. Despite these visits, the underlying problem remains undiagnosed and reoccurs shortly after I retrieve the vehicle. Following the second oil change, the engine developed a persistent ticking noise. Over the past 13 month, I have invested over $200,000 with your dealership in the past 5 years!. My truck was recently held for two weeks for service. After I lodged a complaint, the general manager suggested I seek service elsewhere. This recommendation was made after I responded to an email stating that, following the completion of repairs to the headliner, third brake light, and brakes/rotors, I would no longer be utilizing crain's services. The headliner sustained water damage due to improper installation by your technician, and fingerprints were also evident. I firmly believe in transparent communication regarding service progress, which was notably absent in this instance. Both the general manager and service manager deferred responsibility, instructing me to contact gm directly, only for gm to inform me that direct contact was inappropriate. This resulted in a continuous cycle of unaddressed concerns with the service manager. Currently, I am operating an $80,000 vehicle that has incurred damage from a technician and exhibits a ticking engine. Furthermore, the driver's side mirror, which was previously replaced due to shaking at highway speeds, is now exhibiting the same issue, despite a technician's assertion that this is normal. I also note that my brakes, with over 89% remaining, are beginning to squeak, which your team claims is normal. This assessment is difficult to accept.

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The affected vehicle is a 2017 GMC Sierra 1500 4x4 crew cab truck with less than 34k miles. While driving the vehicle today the brakes became very hard, like a loss of power brakes. Felt like there was a loss of vacumn. At slow speed in reverse the brakes "shuddered" when applied. Have not taken it to a dealer as it just happened while traveling. Cheched for information for symptoms online and found gm had initiated a recall for this issue so I checked the nhts web site to see it my vehicle had a recall. System indicated 0 unrepaired recalls for my vehicle. So wanted to report the issue.

The contact owns a 2023 GMC Sierra 1500. The contact stated upon attempting to start the vehicle remotely, the lights illuminated; however, the engine failed to turn over. The contact stated that upon pressing the push to start button, the message "service braking system" and other braking system messages, and message that the "top speed 43 mph" were displayed. The check engine warning light was illuminated. Additionally, the contact stated that the vehicle experienced reduced braking while driving at various speeds. The vehicle was taken to the dealer where an unknown software update was performed; however, the failure recurred. The contact stated that the failure occurred intermittently. The vehicle was taken back to the dealer, where a service representative scanned the vehicle and informed the contact that diagnostic trouble codes were retrieved; however, the dealer later informed the contact that the failure could not be replicated. The contact used a scanner to scan the vehicle and retrieved diagnostic trouble codes. The manufacturer was notified of the failure and a case was opened. The manufacturer later informed the contact that they could not assist because the dealer stated that the failure could not be replicated. The failure mileage was unknown.