Complaint volume
587 consumer-submitted complaints are matched to this model year. Treat the count as a research signal, then read the actual summaries for repeated symptoms.
Complaint records
2019 GMC Sierra Complaints
587 consumer-submitted complaints on record for the 2019 GMC Sierra, grouped by component category.
587 Total complaints
12 Crash reports
3 Fire reports
7 Injury reports
Complaint data reflects consumer-submitted reports. A complaint is not proof
of a defect, recall, or manufacturer fault. Enriched severity fields come
from official bulk records when the complaint can be matched by ODI number.
Buyer interpretation
How to use these complaints before buying
Complaint records are most useful when they turn into inspection points, seller questions, and comparison checks against nearby model years.
Pattern to inspect
The most common categories are engine, power train, service brakes. Use those categories as a test-drive checklist instead of judging the vehicle from the total count alone.
Severity flags
Enriched records include 12 crash reports, 3 fire reports, 7 injury reports, and 0 fatality reports. These fields come from complaint records and should be read in context.
Mileage clue
Mileage is available on 206 complaints, with an average reported failure mileage of 36,124 miles. Compare that with the mileage on the listing.
Questions to ask the seller
- Have you had any problems related to engine, power train, service brakes?
- Can I see recent maintenance and repair records?
- Has the vehicle ever been towed, involved in a crash, or repaired for the same issue twice?
- Can we also check the recall record for this 2019 GMC Sierra?
Used-car checklist
Use these complaints before the test drive.
Build a buyer checklist to turn these issues into questions and inspection points.
2019 GMC Sierra
Build buyer checklist Compare with other years Sends year, make, and model to pre-fill your checklist.
How severe are the 2019 GMC Sierra complaints?
12 Crash
3 Fire
7 Injury
0 Fatality
50 Towed
1 Medical attention
What are the most common 2019 GMC Sierra complaint categories?
ENGINE 184
POWER TRAIN 75
SERVICE BRAKES 41
UNKNOWN OR OTHER 24
ELECTRICAL SYSTEM 18
POWER TRAIN,ENGINE 17
STEERING 14
ENGINE AND ENGINE COOLING 11
ELECTRICAL SYSTEM,SERVICE BRAKES 9
STEERING,ELECTRICAL SYSTEM,SERVICE BRAKES 9
587 total complaints on record
Latest complaints
| Date | Component | Summary | Severity | Mileage |
|---|---|---|---|---|
| May 2026 | UNKNOWN OR OTHER | Back window water leaking causing bad smell and mod | Crash: No Fire: No | Unknown |
| May 2026 | ENGINE AND ENGINE COOLING | The contact owns a 2019 GMC Sierra LD 1500. The contact stated that while driving approximately 65 mph, the vehicle, went into low power mode, and was able to move safely to a and then the vehicle stalled. The vehicle was towed to an independent mechanic and was diagnosed as the engine has no compression, suspect a possible crankshaft failure, also a possible engine replacement. The manufacturer was notified of of the failure. The contact associated the failure with NHTSA Campaign Number 25V274000 (Engine and Engine Cooling). The approximate failure mileage was 130,000. | Crash: No Fire: No | Unknown |
| May 2026 | POWER TRAIN,ENGINE,FUEL/PROPULSION SYSTEM | While driving, the vehicle suddenly began running rough, losing power, and displaying engine warning lights. Due to the severity of the issue, the vehicle was towed to a GMC dealership for diagnosis. The dealership diagnosed lifter failure and a cracked cylinder head. The dealership also documented coolant intrusion, oil/coolant contamination, and evidence of internal engine damage. Repairs were attempted, including replacement of the cylinder head and lifter. After the repairs were completed, the vehicle never left the dealership because it continued misfiring on the same cylinder. GM later determined the engine had a failed piston ring and scored engine block requiring complete engine replacement. The vehicle has approximately 55,000 miles, has been properly maintained, and was purchased new. This catastrophic engine failure resulted in loss of power and major internal engine damage at relatively low mileage. I also opened a case directly with GM Customer Assistance regarding this failure. The case involved multiple escalations after the initial repair attempt failed and the vehicle ultimately required full engine replacement. GM ultimately advised that only partial assistance toward the engine replacement would be provided, leaving the customer responsible for a significant portion of the repair cost. I am submitting this complaint because this vehicle appears consistent with the ongoing NHTSA investigation involving GM 6.2L L87 engine failures and loss of motive power. | Crash: No Fire: No | Unknown |
| May 2026 | ENGINE | Engine component failure. If not identified early could have caused catastrophic failure being disabled in traffic. This problem has been diagnosed and confirmed by a certified GM dealership. Initial warning sign was a knock in the engine, no warning lamps. First identified on 9/2/25 at 80,345 miles. Dealership changed oil to a higher viscosity. Problem gradually got worse, diagnosed #3 cam lobe failed 3/9/26 at 85,437 miles. | Crash: No Fire: No | Unknown |
| May 2026 | ENGINE | After the vehicle was purchased in October 2023, it immediately had an issue shifting very hard. After numerous trips to the servicing dealership in attempts for error codes to be discovered with no success, the dealership gave the recommendation to flush the transmission as this was a fix for this type of engine in November 2024. The transmission was completely flushed in November 2024. The vehicle continued to have the issue with hard shifting and also developed less efficient gas mileage and would misfire upon ignition and there was a constant knock when running. After a prominent ticking began in May 2026, it was discovered that the timing chain was broken and we were told the rods could impale the engine and go through the hood if the engine was not replaced. The engine had completely failed and needed to be replaced including radiator and hoses. The engine, radiator, and hoses were replaced 05/2026. The invoices for both of these Service transactions are attached. After much research and advice, it appears this issue was the same issue that was happening with the other 6.2L L87 engines from the years 2021 to 2024 that were recalled. | Crash: No Fire: No | Unknown |
| May 2026 | ENGINE | I was driving my 2019 GMC and all of a sudden I pulled into a subdivision the vehicle shut off and would not start again. I wasn't given an y warning or heard any sounds it shut off and would not start up again. I checked the battery and it was fine. I had it towed to a mechanic shop. They replaced the starter, and the battery module. after that they ran codes and the codes were P00C6 and P0340. I had it towed the the local chevrolet dealership and they told me I needed to have the engine replaced, however they don't have any engines available or know when they would be able to get one. | Crash: No Fire: No | Unknown |
| May 2026 | ENGINE,FUEL/PROPULSION SYSTEM | I was on my way home from work and everything was driving fine and then I got 1/4 mile from my house and the motor started making a very loud grinding sound. I could barely accelerate. The issue happened out of nowhere. No issues prior to this happening. I was driving about 40 miles an hour when the issue started and I limped it to my driveway, luckily I was not very far away. I have a 3 month old baby and this was my reliable family vehicle. Who’s to say what could have happened if I was driving at a higher speed with my child in the car. When it happened it started shaking really bad. I checked everything that I could. It sounded like my motor was starving for oil. I decided to go ahead and change my oil to see if that could have been the issue. I had just changed the oil approximately 2000 miles before this. I changed the oil and filter. Went to start it up and still same very loud grinding sound, shut it back off and have not started it since cause I’m afraid to damage it further. I checked the oil that I drained out of it and looks like small metal flakes in the oil. No warning prior to this happening. Just out of no where it sounds and felt like my motor was going to blow. | Crash: No Fire: No | Unknown |
| May 2026 | ENGINE | The contact owns a 2019 GMC Sierra. The contact stated that while driving at 20 MPH, the check engine light began to flash. The driver pulled over. The vehicle was knocking. The contact stated that failure was due to premature engine failure. The vehicle was towed to the local dealer, where it was diagnosed with a cylinder 3 lifter malfunction. The vehicle had misfired. The vehicle was not repaired. The manufacturer was notified, but no assistance was provided. The failure mileage was approximately 77,000. | Crash: No Fire: No Towed | 77,000 |
| May 2026 | ENGINE | The 2019 vehicle experienced a significant engine failure consistent with widely reported issues involving GM 6.2L V8 engines in GMC Sierra and Chevrolet Silverado platforms. Prior to failure, the vehicle developed abnormal engine noise including ticking/knocking sounds, followed by loss of engine performance and mechanical failure. Vehicle diagnosis indicated internal engine damage requiring major repair or full engine replacement. The failure occurred despite normal maintenance and relatively low mileage for a modern full-size truck. The vehicle had no prior abuse, modification, or racing use. Based on technician feedback from December 2025 service call and publicly reported incidents, the failure appears consistent with commonly reported GM 6.2L issues involving: connecting rod bearing failure crankshaft/bottom-end damage lifter or valvetrain failure internal metal contamination sudden engine seizure or loss of propulsion This issue presents a serious safety concern because sudden engine failure can occur during normal roadway operation, potentially resulting in: sudden loss of power inability to accelerate vehicle shutdown while driving increased crash risk in traffic conditions I am aware of numerous similar complaints involving GM 6.2L V8 engines across multiple model years, including investigations and recalls affecting related vehicles and powertrains. My vehicle appears to exhibit the same or substantially similar failure characteristics. I request that NHTSA continue investigation into 2019 model-year GMC Sierra 6.2L engine failures and evaluate whether these earlier vehicles should be included in broader recall or warranty coverage. | Crash: No Fire: No | Unknown |
| May 2026 | ENGINE | I own a 2019 GMC Sierra 1500 Denali equipped with the 6.2L L87 engine. On or around December 31, 2025, the vehicle developed a loud knocking noise from the engine that became worse with RPM increase. The truck was taken to a GMC dealership for diagnosis and repair under warranty/service contract coverage. The dealership initially diagnosed valvetrain-related failure and replaced multiple top-end components including lifters, rocker arms, camshaft-related parts, belts, pulleys, hoses, and associated hardware. After reassembly, the engine reportedly started briefly and then failed again. The dealership then performed additional teardown and determined the lower end of the engine had also failed. I was informed by dealership staff that rod bearing failure is “very common” on the L87 6.2L engines. Due to the extent of the damage, the vehicle ultimately required a complete long block replacement. My truck remained out of service from approximately 12/31/2025 until 5/1/2026, a period of roughly four months. During that time, there were repeated delays involving diagnosis, inspections, warranty approvals, and additional teardown procedures. The vehicle had approximately 111,858 miles at the time of failure and had been regularly maintained. Prior to the engine failure, the truck exhibited abnormal engine ticking/knocking noises under load and higher RPM operation. The final repair performed was replacement of the engine long block assembly. I am submitting this report because the dealership indicated this type of lower-end/rod bearing failure is common on the GM 6.2L L87 platform, and I believe this issue may represent a broader reliability and safety concern affecting other owners. | Crash: No Fire: No | Unknown |
| May 2026 | TIRES | On March 14 2026 i was driving from [XXX] . To [XXX] to have my tires checked because i felt a strong vibration on my steering column and truck itself, it was getting worse so i took it to my mechanic who does my regular maintenance on truck. After inspecting tire ( [XXX] 55 R20) was called over and shown that my front passenger side tire had a flat spot, it looked deformed mechanic informed me that the tire had separated from radial. And i need to get another tire right away, since there was non in stock we did the next best thing we took the front passenger tire the affected tire put it in the back and put the rear good tire up front. The next day i was on my way to purchase the replacement tire when the tire blew out. I was on a heavily traffic road [XXX] . I managed to take control of truck doing about 40 mph at the time and drove it off the road to a safer spot to look at damage. Well the passenger rear tire witch was originally on the front that had the separated radial blew a chunk out of the inner sidewall. I put on the spare and went and replaced the tire with another goodyear new tire. On march 28 as i was coming home from [XXX] late at night the driver side rear tire blew as well again had to put on spare and next day took to local mechanics in [XXX] , and checked tire and again i was told that the tire separated from radial and that was the cause of blew out, they inspected all the tires at this point since this was the second tire from the same DOT set with less then 12000 miles that had separated. Well they found a third tire that had aldo separated and had a flat spot on driver side front tire, now there are 3 tires from the same set, coincidence, i dont think so i replaced the second and third tire. One the third day April 1, 2026 the passenger side front tire blew as well, now i have 4 tires that had radial separation with less then 12000 miles and less then a year old, in a mater of a month. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6) | Crash: No Fire: No | Unknown |
| May 2026 | TIRES | On March 14 2026 i was driving from [XXX] . To [XXX] to have my tires checked because i felt a strong vibration on my steering column and truck itself, it was getting worse so i took it to my mechanic who does my regular maintenance on truck. After inspecting Tire Goodyear Wrangler SR-A ( 275 55 R20) front passenger , mechanic informed me that the tire had separated from radial. And i need to get another tire right away, since there was non in stock we did the next best thing we took the front passenger tire the affected tire put it in the back and put the rear good tire up front. The next day i was on my way to purchase the replacement tire when the tire blew out. I was on a heavily traffic road [XXX] . I managed to take control of truck doing about 40 mph at the time and drove it off the road to a safer spot to look at damage. Well the passenger rear tire witch was originally on the front that had the separated radial blew a chunk out of the inner sidewall. I put on the spare and went and replaced the tire with another goodyear new tire. On march 28 as i was coming home from [XXX] Ca late at night the driver side rear tire blew as well again had to put on spare and next day took to local mechanics in [XXX] , and checked tire and again i was told that the tire separated from radial and that was the cause of blew out, they inspected all the tires at this point since this was the second tire from the same DOT set with less then 12000 miles that had separated. Well they found a third tire that had aldo separated and had a flat spot on driver side front tire, now there are 3 tires from the same set, coincidence, i dont think so i replaced the second and third tire. One the third day April 1, 2026 the passenger side front tire blew as well, now i have 4 tires that had radial separation with 2 that had blew out chunks from inner wall, with less then 12000 miles and less then a year old, in a mater of a month. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6) | Crash: No Fire: No | Unknown |
| May 2026 | ELECTRICAL SYSTEM,SERVICE BRAKES,ENGINE | I am getting warning signs on the dashboard saying that my brake booster performance has failed and I need to service the brake booster , the brakes are very hard to press, I need longer stopping distances,and traction control and stability control towing harness my speed has been limited to 43 mph and it's saying that the mass air flow system is has low circuit | Crash: No Fire: No | Unknown |
| May 2026 | TIRES | On March 14 2026 i was driving from [XXX] . To [XXX] to have my tires checked because i felt a strong vibration on my steering column and truck itself, it was getting worse so i took it to my mechanic who does my regular maintenance on truck. After inspecting tire ( [XXX] 55 R20) was called over and shown that my front passenger side tire had a flat spot, it looked deformed mechanic informed me that the tire had separated from radial. And i need to get another tire right away, since there was non in stock we did the next best thing we took the front passenger tire the affected tire put it in the back and put the rear good tire up front. The next day i was on my way to purchase the replacement tire when the tire blew out. I was on a heavily traffic road [XXX] . I managed to take control of truck doing about 40 mph at the time and drove it off the road to a safer spot to look at damage. Well the passenger rear tire witch was originally on the front that had the separated radial blew a chunk out of the inner sidewall. I put on the spare and went and replaced the tire with another goodyear new tire. On march 28 as i was coming home from [XXX] late at night the driver side rear tire blew as well again had to put on spare and next day took to local mechanics in [XXX] , and checked tire and again i was told that the tire separated from radial and that was the cause of blew out, they inspected all the tires at this point since this was the second tire from the same DOT set with less then 12000 miles that had separated. Well they found a third tire that had aldo separated and had a flat spot on driver side front tire, now there are 3 tires from the same set, coincidence, i dont think so i replaced the second and third tire. One the third day April 1, 2026 the passenger side front tire blew as well, now i have 4 tires that had radial separation with less then 12000 miles and less then a year old, in a mater of a month. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6) | Crash: No Fire: No | Unknown |
| May 2026 | ENGINE | Engine ceased while driving and shutdown. Towed to dealership. Dealership ran diagnostic test and code P0016 came up. Its 6.2 engine has recall on other years with similar issues | Crash: No Fire: No | Unknown |
| Apr 2026 | ENGINE AND ENGINE COOLING,ENGINE | The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving approximately 65-70 MPH, the engine seized and made an abnormal sound, nearly causing a semi-truck to jackknife and crash into the vehicle. There was no warning light illuminated. The contact was left stranded in the west desert of Utah, where a wildfire had started, and the contact did not have phone service. Additionally, the vehicle stopped on a two-lane road with heavy semi-truck traffic, leaving the contact frightened and terrified for her safety. The contact jumped out of the vehicle. Migrants who were tending the sheep nearby assisted the contact in pushing the vehicle to the side of the road. The vehicle was towed to the dealer, where it was diagnosed with engine failure, and the dealer determined that the engine needed to be replaced. The vehicle was not repaired. The contact related the failure to NHTSA Action Number: EA25007 (ENGINE, ENGINE AND ENGINE COOLING). The manufacturer was notified of the failure, and the contact was misinformed that the model year was not included in the NHTSA investigation. The contact informed the manufacturer that she no longer felt safe driving the vehicle, regardless of the engine replacement, and the contact advised the manufacturer to guarantee that the failure would not recur after the engine replacement. The manufacturer then referred the contact to the NHTSA Hotline for assistance in investigating the safety issue. The vehicle was not repaired. The failure mileage was 122,187. | Crash: No Fire: No Towed | 122,187 |
| Apr 2026 | ENGINE | The contact owns a 2019 GMC Sierra 1500 Denali. The contact stated that while driving at an undisclosed speed on a local roadway, the oil pressure warning light illuminated. The contact stated that oil was leaking from the vehicle. The vehicle was towed to the residence. The vehicle was then taken to the dealer, where it was diagnosed, and it was determined that the engine had seized. The manufacturer was not notified of the failure. The approximate failure mileage was 71,000. | Crash: No Fire: No Towed | 71,000 |
| Apr 2026 | ENGINE | While passing a vehicle the engine failed and had to replace the engine. The cams and lifters went out. | Crash: No Fire: No | Unknown |
| Apr 2026 | STEERING,ENGINE | driving and truck started to misfire (due to collapsed lifter after shop diagnosis) that then made my truck do reduced steering assist and my wheel got super hard to turn that almost sent me in the ditch at 60MPH and also turned off my Electronic Stability Control and also turned on my Service Parking Brake drove straight to the shop and parked it very lucky i did not crash and the fact that multiple people this has happend too GM need to recall from the 2019 and up for these lifters after reading about it. | Crash: No Fire: No | Unknown |
| Apr 2026 | POWER TRAIN | Shuddering, slipping, then lost all gears. Unable to put in reverse, drive, or low. Repair shop says the transmission needs replacement. Pump and torque converter issues. Vehicle has excellent maintenance and only 84k miles. | Crash: No Fire: No | Unknown |
| Apr 2026 | ENGINE | While I was slowing down when approaching a red light, the engine abruptly shut off and had no warning or anything. Then once stopped the engine would no longer crank leaving me stranded in the middle of a busy roadway. | Crash: No Fire: No | Unknown |
| Apr 2026 | SERVICE BRAKES, HYDRAULIC,POWER TRAIN,ENGINE | The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving approximately 5 MPH, the rear wheels locked up. The check engine warning light was illuminated. The vehicle was taken to a local dealer, where it was diagnosed, and determined that the brakes needed to be replaced. The vehicle was repaired; however, the failure recurred intermittently. The vehicle was taken to another local dealer, Walker Bros Chevrolet (700 Erie St, Edinboro, PA 16412); for a second opinion, and the transmission and TCM were replaced. The vehicle was repaired; however, the failure reoccurred. Upon further investigation, the contact related the failure to the Customer Satisfaction Program: N192272400; however, the VIN was not included. The manufacturer was notified of the failure, and a case was filed. The failure mileage was approximately 40,000. | Crash: No Fire: No | 40,000 |
| Apr 2026 | ELECTRICAL SYSTEM,ENGINE | The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving approximately 45 MPH, the accelerator pedal was depressed; however, the vehicle lost automotive power and stalled. Several unknown warning lights were illuminated when the vehicle stalled. The contact was unable to restart the vehicle, and the vehicle was towed to the residence. The contact became aware that the 400 AMP fuse was blown. The contact replaced the fuse and replaced the starter, however during a test drive, the vehicle stalled. The vehicle was taken back to the residence, and a 400-AMP fuse was replaced a second time. The contact also replaced the starter, the alternator and replaced the ground cables, and during another test drive, the vehicle stalled. The vehicle was taken back to the residence and the contact determined that the engine had seized. The vehicle was not repaired. The manufacturer was informed of the failure. The contact researched online and related the failure to NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling); however, the VIN was not included in the recall. The failure mileage was approximately 159,000. | Crash: No Fire: No Towed | 159,000 |
| Apr 2026 | ENGINE | Lifter failure cylinder #8, this is a 2019 GMC Sierra Denali 4x4. It has a 6.2L engine. With 92823 miles on it. It would be nice if GM would do a recall on this year motor as well. | Crash: No Fire: No | Unknown |
| Apr 2026 | ENGINE | I have a 2019 GMC AT4 and it has stalled on the highway multiple times and smokes every time I started. I have read that the engine in it has been recalled on multiple other years but the one I purchased needs a 25,000 repair and it’s not safe to drive. There is not a current recall, but I’ve read that this engine on almost all the other trucks and SUVs that have it have had problems. | Crash: No Fire: No | Unknown |