general problems of the 2019 GMC Sierra 1500 - part 1

The park assist would go on when I was at a stop light and no one was in front of me and auto stop was off all the time. Two ground straps were corroded. There is a recall on them from 2019 to 2024. My truck did not have a recall on it. I just want to let you know and maybe if enough people complain, you will put all trucks on the recall.

I was driving up the road truck cranked up fine started a morning commute, on cruise control the truck instantly out of nowhere lost power completely with no signs of anything and engine won’t attempt to turn over now. I fear the worst has happened which would be catastrophic internal failure for to a faulty engine & its internals.

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at 25 mph and making a turn, the vehicle lost motive power. There were several unknown warning lights illuminated after the failure. Upon investigation, the failure was related to NHTSA campaign number: 25v274000 (engine and engine cooling). The vehicle was towed to an independent mechanic, where it was diagnosed with lifter failure and camshaft damage. The vehicle was repaired. The local dealer was not contacted. The manufacturer was contacted and opened a case, and referred the contact to the local dealer for assistance. The failure mileage was approximately 86,960.

Complete engine failure. I was driving approximately 55 miles an hour, then all of a sudden the cruise control automatically shut off and a series of alarms are triggered. When pressing the accelerator pedal, the engine vibrated excessively in cleary indicated catastrophic engine failure. I was lucky enough to make it to the nearby dealer who confirmed a complete engine failure. I ended up buying a new vehicle that day to avoid being stranded.

This truck needs 2500. 00 in work to replace electrical harness after months of problems and evaporating leaks.

Vehicle (2019 GMC sierra slt x31!crew cab 6. 2 l gas engine) stopped running while driving down the road (Wednesday 9/3/2025). Tried to start truck - would crank over quickly but failed to start ( crank no start with no check engine light. ) tried several times same result. Started after about 5-10 minutes and was displaying low fuel indicator even though we knew it had approximately 1/2 tank. We immediately put gas in it and it took approximately 1/2 tank to fill. Still no check engine light and confirmed no stored codes via onstar report. Drove the truck around for may 1hr and check engine light came on but was still running and did not stop running like it did earlier. On star reported ecm system code p129f ( fuel pump or fuel pump power control module). Long story short, put truck in independent repair shop I use. They diagnosed it was a defective fuel pump located in fuel tank. They told me gm technical support recommended to replace the fuel pump and fuel pump power and control module at a cost of ~$1325. 00. It is my opinion this is a safety hazard and very similar if not exactly the same failure symptoms / modes as others have already reported. I requested to keep the failed parts and still have them in my possession. Please review and let me know if you need or want additional information . Best regards, bruce rivera 512-924-9839 riveratb176@gmail. Com.

The contact owns a 2019 GMC Sierra 1500. The contact stated while driving approximately 45 mph, the message "battery saver alert" was displayed on the instrument cluster. The contact stated that the battery gauge was reading 9v on the 12v battery. The vehicle was driven to a dealer. The dealer diagnosed the vehicle and determined that a battery tender was needed. The contact asked the dealer to check the 12-volt battery which was replaced 2 years prior by the same dealer. The dealer diagnosed the vehicle and determined that the alternator needed to be replaced. The contact was later informed that the battery fuse also needed to be replaced. The vehicle was repaired. The manufacturer was not informed of the failure. The contact researched online and related the failure to NHTSA campaign number: 19v888000 (electrical system); however, the VIN was not included in the recall. The failure mileage was 43,742.

Subject: urgent vehicle safety complaint – 2019 GMC sierra denali escalating mechanical and electrical failures — many beginning before 100,000 miles, and continuing as of today, at approximately 110,000 miles. These issues have made the vehicle unreliable and unsafe to drive. Since purchasing the vehicle, I have had it serviced regularly and reported that it was driving rough, jerking into gear, and showing early signs of engine and transmission problems. These issues were noted during multiple multipoint inspection services, yet no lasting solutions were provided. Major issues have included: •engine performance failures •fuel injector malfunction •serpentine belt and idler pulley damage •a/c compressor belt failure •power steering malfunctions •vehicle stalling at traffic lights •loss of power on major highways •rear window water leaks •significant and ongoing electrical system problems •shaking when brakes applied after having brakes and rotors replace in March •screen monitor going out after paying over $ 900 dollars for updated software and repairs to the electronic component that cost over $2500. Despite continued maintenance, on Thursday, July 3, 2025, my truck began losing power and smoking heavily while driving on a busy highway in georgia. My grandchild, who was riding with me, yelled, “grandma, it’s smoking — please get out!” as we pulled off the road in fear of a fire. This terrifying incident left us stranded and emphasized just how dangerous this vehicle has become. I filed a formal complaint with the GMC corporate office, but no support provided or an investigation. Over the past six months, I have spent more than $5,000 trying to keep this vehicle operational. So many critical systems have failed, despite consistent maintenance, raises serious concerns. Finally, the fuel injector repaired 3 days later a message on dashboard displaying service tire monitor system and steering wheel shaking when brakes are applied.

The vehicle is available for inspection - 35,000 approximate miles with a ebcm module repair needed in order to repair it to a level that meets federal motor vehicle safety standards of at minimum s5. 3 no. 126 & s5. 1 no. 135 - I believe this vehicle should have been/should be included in the original and/or expanded recall n192268091. The vehicles electronic brake assist is not working causing it to be disabled. It has been inspected by denny menholt GMC. Warning lamps/message occurred - diagnosed - repair needed to make this vehicle safe for the driver, passenger(s) and others when the vehicle is operating.

My 2019 GMC sierra denali shut off suddenly while I was stopped in traffic. The engine died, the steering wheel locked, and the dashboard displayed warning messages including “esc,” “power,” and another I didn’t catch. The truck would not restart despite attempts. The check engine light is now on. This happened without warning, and I had no prior mechanical issues. The vehicle is well maintained, garage-kept, and recently received a full service including oil change, brake work, and 75k-mile recommended service. I fear this is related to a known issue affecting other GMC engines under investigation for sudden power loss.

I’m contacting you regarding my 2019 GMC Sierra 1500 with the 5. 3l v8 engine. The vehicle is currently experiencing a cylinder 8 misfire (code p0308), accompanied by engine backfiring, ticking noise, and exhaust fumes inside the cabin. Additionally, the esc (electronic stability control) warning light is on, and performance is noticeably affected. To date, I have: •replaced all spark plugs and fuel injectors •verified proper ignition coil function •had an oil change on September 23, 2024, during which I reported early concerns about engine performance (shortly after the powertrain warranty expired) •had a transmission flush on March 17, 2025, in an attempt to resolve continued drivability issues despite these efforts, the issue persists. Given the known issues with afm lifters and camshaft wear on this engine, I suspect a mechanical failure related to that system.

Just purchased this vehicle, at 84000 miles had engine failure and electrical issues while traveling down interstate with my family. Lost power steering and all warning lights popped up. Safely exited busy interstate -- avoided major accident. This engine should have been included in the recent GMC recall - after a diagnostic $7000. 00 plus to fix. Unsafe engine issue!! please help the consumer!!.

I had engine failure two weeks after a schedule maintenance that included a tune up. When the engine failed all the components made the vehicle impossible to operate much less bring to a stop safely. I had to get the vehicle towed to the dealer. The dealer confirmed that the engine (6. 2 v8) has a known documented issue. The vehicle is at my dealer with the engine being disassembled. There weren't any warnings as I stayed on the maintenance schedule that the dealer mapped out since my purchase. The problem began 4/12/2025. After researching the issue I found this online. That is how I found your web site. . Read more...

Transmission keeps skipping missing gears and hard shifting, as well as jolting forward. When attempting to switch lanes vehicle transmission skips. When being placed from park to drive or any other gear vehicle transmission hard shifts. Vehicle radio and screen shut off intermittently every 30 to 45 minutes. Vehicle screen goes blank and black and resets itself after 30 to 45 minutes.

My truck has a blue screen that appears randomly on occasion that states service rear view system. This is a major safety concern. And after reading online it is a very common occurrence on 2019-2025 gm pickups. It needs to be recalled and a for sure fix done to prevent from backing into someone or something. I have small children and my biggest fear is running them over while playing in the yard and I rely very much on my rear view/360 camera to make sure this doesn’t happen even after double and triple checking they are no where near danger before stepping in my vehicle.

When going to shut off vehicle, when you push the push start button the engine will turn off but the radio and all the instrument panel, gauge lights, and dinging noise are still on. It states on the screen to shift to park. The vehicle is in park and even sometimes has the parking brake on. It can stay on from 1 minute to numerous minutes, which is only running my battery and other things down on my truck. This has happened daily.

While attempting to accelerate to get onto the expressway with no warning, the vehicle went into limp mode. Traction control, front end warning collision, auto/stop start functionality was all disabled and the engine light warning light on came on. The vehicle locked out and reduced acceleration. An attempt to pull over and turn the vehicle off for a few seconds was made. Once restarted, the vehicle continued running on limp mode at reduced speeds with the same indicators mentioned still disabled and locked out.

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.

Lifters in engine failed at beginning of March 2025 and destroyed inside of engine. Transmission failed in summer of 2024 and had to be replaced.

While driving at 65 mph on a freeway, the engine failed and cracked a rod with fresh oil and all maintenance done regularly. Truck brakes would not work after engine failure. Truck was fully disabled and I was stranded on freeway @ 90,000 miles. Lights on exterior of the vehicle were dim after engine failed.

Complete engine failure. Absolutely insane. All lights on dash, engine seized while driving!!!!!!!!!!!!!! unbelievable that GMC keeps making us fix issues and pay for it! they won't cover the cost. This has been happening too much and putting my family at risk!.

When accelerating it will over rev and then slip and then punch foward I had a diagnostic did and the sensor in the transmission aren't working properly and then when just driving my etrak also randomly went out and I can no longer active cruise controll.

At around 28,000 miles the truck started having intermittent electrical issues. The head unit will show a blue screen. Safty systems will automatically disable. Camera system failures. Even though the truck is a 2019 model it only has around 31,000 miles on it and is now out of warranty and I can’t afford to have the dealership chase electric issues. GMC should be ashamed of putting out such an unreliable vehicle.

While driving the vehicle caught engine fire later exploding within seconds.

The contact owned a 2019 GMC Sierra 1500. The contact stated that while driving 25 mph, there was an abnormal sound coming from the rear of the vehicle before the vehicle jerked forward. There was no warning light illuminated. The contact was able to pull over on the side of the road. The contact also stated that the radio would turn on, but there was no image on the screen. The contact took the vehicle to the dealer; however, no cause for the failure was found. The vehicle was not diagnosed nor repaired. The manufacturer was made aware of the failure and informed the contact that the vehicle was no longer covered under an undisclosed customer satisfaction program. The contact stated that the abnormal sounds and failure persisted, and the manufacturer was contacted again. The vehicle was taken to the dealer and was diagnosed with a misfire and that the brake lights needed to be replaced. The vehicle was not repaired. The failure mileage was approximately 42,000.

2019 GMC Sierra 1500 slt. Truck would not start on several occassions. By playing with brake, shift, and steering wheel truck would start again. , also would show warning notices, last one being {engine oil low-add oil}, even right after I just had the oil changed. This last time it would not start I paid to have my mechanic come to me to check it out. He tested a lot and thought it might be the starter so I then had to pay to have it flat-bedded to their garage. What he finally found was a bunch of wires worn through in a major wiring harness. It was caused by the wiring harness being next to the steering knuckle and the steering was wearing through the wires exposing bare wires. The mechanic and I see this as a major safety concern and a possible fire hazard. He has told me others have had similer problems . I believe this should definitly be a safety recall for these vehicles. My mechanic states that a new wiring harness olone is about $1500. 00 plus a lot of labor to install it. I do not believe that I should have to pay for a defect in GMC building this truck I have a picture of this mess of wires if you can help me with this. Don't know how to upload the photo I have but would gladly send it to you, please respond back to this. Thank you dennis dorn.

GMC of vacaville California sold me a 2019 GMC sierra that has a know back window leak issues. I was told by service worker GMC of vacaville California sold me a 2019 GMC sierra that has a know back window leak issues. I was told by service worker brent lewis/405 that is a common issue and GMC is aware of this issue that the vehicle was brought in before for this same issue prior from [xxx] but was not taken care of. I purchased this vehicle on [xxx] along with a 5k extend warranty that I was told is a bumper to bumper warranty. Come to find out it does not cover a manufacturer defected back window installation. My concern is that they are aware of these issues and water sitting on the inside of the cab due to a leak causes black mold and could cause serious illness to myself and my children. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Rear sliding glass window is leaking water around the exterior frame. This is addressed in TSB 18-na-383 but not covered under any warranty. My rear seats and carpet are becoming wet. I am concerned about the possibility of mold and an electrical short/fire resulting from water intrusion. There are many reports and discussions on the internet regarding this issue. Full window replacement estimated at $1300. Patchwork repair with caulk is estimated at $600 with no guarantees of success. I would expect GMC to cover the replacement of the rear glass in kind and remedy any other damage to my vehicle due to water intrusion into the cabin area.

Complete system failure while driving. Lost control of vehicle, no breaks. Had it brought to dealership. Lifter failure and bent rod, top engine failure which caused everything to malfunction. Vehicle has 88k miles on it. This is a defect. We had taken it in for the ticking problem in the past and they did nothing for us. Everything is documented. We are afraid that bottom half of engine was compromised. Do not feel safe driving this vehicle anymore. I do not want it to blow or lose control of vehicle again. This is a known issue and must be addressed. There was a service bulletin put out for my engine and there is an exact part by part that needs to be replaced, however gm is unwilling to listen to us at this time. Please look into this because this will happen to more and more consumers. This is very scary. What is the cost of a life?.

My engine went out with no lights or warnigns prior to engine going out. Now we still making payments for the truck,expensive truck and we haven't use it because we dont have the money to fix it.

Question #1- “service trailer brake system”-“steering assist is reduced drive with care”-brake system failure 43 mph top speed”-“service esc” question #2- I experienced a complete loss of braking ability, myself, a friend and, a coworker, as well as the properties around me where placed at risk. Question #3 not yet I am having towed to the dealer today. Question #4 not yet the vehicle will be towed to the dealer where I purchased it today. Question #5 not my knowledge I do not recall any warning lights.

There is a water leak coming into the back cab of my 2019 GMC sierra. My truck smells horrible the dealership can't find the leak. It smells very moldy and very concern for my children riding in the back breathing the unsafe air.

The contact owns a 2019 GMC Sierra 1500. The contact stated while driving 60 mph, the a/c stopped working. Additionally, the contact smelled a electrical wiring burning odor. There was no warning light illuminated. The contact then noticed smoke coming from under the glove compartment. The contact stated that he pulled to a carwash and exited the vehicle. An explosion occurred under the hood and the vehicle caught on fire. The contact stated that the vehicle burned significantly. The contact was able to extinguish the fire with the assistance of the fire department. A police report was filed. A fire department report was filed. There was no injury sustained. The vehicle was towed to a tow yard, where it was totaled. The dealer was notified of the failure. The manufacturer was not notified of the failure. The failure mileage was 49,653.

The contact owns a 2019 GMC Sierra 1500. The contact stated while driving at an undisclosed speed, the vehicle jerked and failed to accelerate as intended while depressing the accelerator pedal. There was an abnormal sound coming from the transmission. The message "reduced engine power” was displayed and the transmission warning light was illuminated. The vehicle was taken to the dealer and the transmission was repaired. The contact stated that the failure persisted. The vehicle was taken back to the dealer, and the transmission was replaced. The contact stated that on a separate occasion, the a/c failed to function as intended. The contact had to drive for fifteen minutes for cold air to come from the a/c vents. The vehicle was taken to houston Cadillac and the vehicle was repaired. The contact stated that the failure persisted. The dealer diagnosed the vehicle and informed the contact that there was a short circuit. However, no cause for the short circuit failure was found. An unknown repair was done on the vehicle. The contact stated that the failure persisted. The check engine warning light was illuminated. The contact stated that on a separate occasion, there was an abnormal sound coming from the steering wheel. The vehicle was taken to payne rio Chrysler Dodge Jeep ram, where it was diagnosed that one of the bolts found on the steering column was missing and the other bolt was loose. The vehicle was repaired. The contact was informed that the a/c condenser had failed. The vehicle was repaired. The contact stated that the failure persisted. No warning lights were illuminated. The vehicle was taken back to the dealer. The entire a/c assembly was replaced. The contact stated that the failure had occurred soon after the vehicle was purchased. The manufacturer was not notified of the failure. The failure mileage was unknown.

Was driving around 70 mph brakes started engaging and disengaging truck felt like engine was missing, brake light luminated and stated to stop vehicle abs light luminated as I got to the emergency lane I had no brakes pedal went to floor and I came to a stop after coasting and pressing pedal. Once stopped trailer towing light luminated ( I was not towing anything). I exited truck and it was apparent this was a issue with the front brakes as they were smoking. Rotors appear to have marks in them when compared to rear. After about 30 minutes I started truck and there was no indication on dash of a problem had brake pedal. The truck has 50800 miles on it. Contacted dealer (hendricks chevy) this morning they said it was not covered and no recalls I discussed brake issues I read on line again they repeated no recalls in system for my truck, but would be glad to look at it in 2 weeks.