10.0

really awful
Crashes / Fires:
0 / 2
Injuries / Deaths:
0 / 0
Average Mileage:
9,098 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2019 GMC Sierra 1500 engine problems

engine problem

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2019 GMC Sierra 1500 Owner Comments (Page 1 of 3)

problem #42

Jun 032024

Sierra 1500

  • miles

A D V E R T I S E M E N T S

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 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

- Springfield Center, NY, USA

problem #41

May 102024

Sierra 1500

  • miles
Check Engine Light came on while driving system scan states misfire cylinder 6 but resulted in the lifter being damaged as well as the cam shaft on a vehicle that has 108,000 miles. Prior to this I reported multiple times that it seemed that the transmission would slip and stuttered when on a incline and put in reverse. I was told it was a computer program issue and was charged for a software update which obviously did not fix the issue but ruined the engine.

- Harrisburg, NC, USA

problem #40

Apr 132024

Sierra 1500

  • miles
Driving on the highway coming home from brother in laws house and the truck suddenly popped check engine, brake service and ESC lights came on dashboard while engine power was reduced causing sluggish performance. Made it home and put a scan tool and pulled a cylinder 3 misfire. Replaced spark plug and confirm it-??s not an ignition coil problem. Brought to dealer and was confirmed the DOD lifter failed in other words AFM. Overwhelmed and couldn-??t do anything but to pay and get truck back to working order told go ahead for replacement of parts for nearly $6k.

- Maplewood, MN, USA

problem #39

Nov 092023

Sierra 1500

  • miles

A D V E R T I S E M E N T S

Lifter cam failure. Twice

- Kingwood, TX, USA

problem #38

Feb 172024

Sierra 1500

  • miles
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?

- Mt Laurel, NJ, USA

problem #37

Sep 252023

Sierra 1500

  • miles
Engine oil cooler line crimp connections are not properly crimped and leaking oil whether the truck is operating or sitting off. It also appears the flare or threaded connection has failed. I went to the GM dealership who said my truck wasn-??t part of the recall but my lines are very clearly the same affected parts and would not be available for repair under the recall. I suspect there are other trucks like mine that were missed in the initial recall. I had the lines inspected at another repair shop but all the GM oil cooler lines were unavailable and no back order was permitted. There have been no warning lights for low oil pressure yet but the worst level I have seen so far was only 3 of 8 in quarts in the oil pan. I-??m afraid of the lines blowing out on the road and causing a total uncontrollable engine failure and oil slick for other drivers.

- Casco, ME, USA

problem #36

Sep 132023

Sierra 1500

  • miles

A D V E R T I S E M E N T S

With only 89K miles on my vehicle I-??m having to replace 13K dollars worth of parts due to a known issue with the 5.3L V8 engine with the AFM DOD system that GM hasn-??t fixed and refuses to help cover the cost cause I-??m outside my warranty. I feel they need to extend the warranty miles and time frame due to the common occurrence of this issue

- Van Alstyne , TX, USA

problem #35

Sep 112023

Sierra 1500

  • miles
Engine Oil Cooler Line detached from Crip fitting. Vehicle: 2019 Sierra 1500 powered with 6.2L L87. GM has a published policy for a specific 530 vehicles, GM Claims my VIN was not covered hence no recall police "Customer Satisfaction Program N212326940" letter was released for subject VIN. It's clear, this issue exists beyond the scope of 530 vehicles. No know warnings existed prior to the incident. Vehicle has been repaired at owners expense and not supported by GM.

- Brooklyn, MI, USA

problem #34

Jul 072023

Sierra 1500

  • miles
The lifter valves for the dynamic fuel management system have failed twice resulting in an immediate loss of power, rough driving, and low speed. To replace the first time, it cost $3500 at a mechanic. The 2nd time that it happened (8 months later), we now have to have the engine replaced and it cost almost $10,000. GM has refused to take any ownership in these faulty lift valves and someone is going to lose control of their vehicle when this occurs.

- Festus, MO, USA

problem #33

Aug 032023

Sierra 1500

  • 84,000 miles
The contact owns a 2019 GMC Sierra?1500. The contact stated while driving 25 mph, the oil pressure low/turn vehicle off warning light was illuminated. The contact was able to park the vehicle at a near parking lot. The contact exited the vehicle and hear an abnormal noise exiting under the vehicle and saw an oil leak. The contact stated her father-in-law came to the location to add oil but the vehicle keep leaking. The vehicle was not drivable. The contact towed the vehicle to the local dealer, where it was diagnosed with the engine cooler line needed to be replaced. The vehicle was not repaired. The manufacturer had been informed of the failure. The failure mileage was approximately 84,000.

- Magnolia, OH, USA

problem #32

Jun 012023

Sierra 1500 8-cyl

  • 49,653 miles

A D V E R T I S E M E N T S

The contact owned a 2019 GMC Sierra 1500. The contact stated while driving 60 MPH, the A/C stopped working. Additionally, the contact smelled an 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.

- Combined Locks, WI, USA

problem #31

Jul 102023

Sierra 1500

  • miles
Oil cooler line detached from crimp while driving at highway speeds forcing the vehicle to an emergency stop on the side of the road. All oil pressure was lost immediately and entire underside of vehicle including tires, brakes, and wheels were all coated in oil. Known issue for same year, make, and model that has already been listed from NHTSA. But, apparently this VIN was not in the affected range.

- Elkhart, IN, USA

problem #30

Apr 232023

Sierra 1500

  • miles
According to inspection by my local GMC dealership, the engine oil cooler lines leaked/detached, as a result the engine assembly needs to be completely redone. When driving on the highway the car began flashing to immediately pull over and turn the vehicle off, the engine became very hot and was smoking and oil was found all over the ground upon inspection after immediately stopping the vehicle. This vehicle has been inspected by the Carlsbad GMC/Buick Dealership. There were no warning messages prior to this event. The car has consistently received all recommended preventative maintenance and oil changes. As a consumer I am now on the hook for over $15,000 in repairs, after complying with all maintenance recommendations from the manufacturer. There is an active recall for an identical model and make as this car for the same issue, the recall number is: N212326940 (customer satisfaction program number) and DCS5833 (Global safety field investigations number). I am very confused as to why this recall has not been applied to my vehicle.

- Oceanside, CA, USA

problem #29

Mar 312023

Sierra 1500

  • 82,000 miles
The contact owns a 2019 GMC Sierra 1500. The contact stated while driving 10 MPH, the low oil pressure warning light illuminated. The contact stated that he parked the vehicle and became aware that oil was leaking underneath the vehicle. The vehicle was not drivable. The contact towed the vehicle to the local dealer, where it was diagnosed with needing the engine oil cooler line to be replaced. The vehicle was not repaired. Upon investigation, the contact associated the failure with Customer Satisfaction Program Number: N212326940 (Engine Oil Cooler Lines Detaching from Crimp); however, the VIN was not included. The manufacturer had been informed of the failure. The failure mileage was approximately 82,000.

- Greenwood, IN, USA

problem #28

Mar 292023

Sierra 1500

  • miles
Engine had catastrophic failure while driving down highway with no warning. No check engine light. Loud bang and loud metal on metal slapping with violent shaking of front end of truck. Towed to dealer. So far they say lifter failed, and push rod collapsed and drove through engine block. 40000miles, 2019 Sierra 1500 Denali with 6.2l V8.

- Kirkville, NY, USA

problem #27

Mar 012023

Sierra 1500

  • miles
I have faulty lifters and it has been inspected by a GM dealer. I believe this issue should have a service bullentin to have it fixed. They have others for faulty valve lifters in the same model truck that I have.

- Madison, AL, USA

problem #26

Feb 232023

Sierra 1500

  • 30,000 miles
The contact owns a 2019 GMC Sierra 1500. The contact stated that while parked, the vehicle began to make an abnormal sound and shuddered. The contact turned the vehicle off and the vehicle failed to restart. The vehicle was towed to the dealer; however, the vehicle was not yet diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 30,000.

- Baytown, TX, USA

problem #25

Feb 212023

Sierra 1500

  • miles
While driving on the highway, I got a message that said "low oil pressure, turn off engine" with red flashing lights. I could also smell burning oil and metal. I immediately pulled over and turned off my engine. When I exited my truck, I could see all of the oil that remained in my engine leaking onto the ground. My truck was towed to a local repair shop and they advised me that this is a common problem in this truck. The oil line blew likely due to a defective crimp. The mechanics can't repair the problem right away because this line is on a national backorder and there is no aftermarket option. This obviously happens too often if this part is on backorder. The mechanics believe there may have been damage done to the engine as a result of losing all of the oil on the highway.

- Abington, MA, USA

problem #24

Feb 152023

Sierra 1500

  • miles
Engine began having ticking noise. I took it to dealer for repair. Service department finds the lifters in my engine have failed and destroyed my cam shaft. They call me and explain it will cost $10,000 to repair. The service writer explains to me that they have 4 of these each week come into the shop. It is so common that they keep the parts in stock to repair. While I was waiting in the waiting room another person came in with the exact same problem. I later found that a repair bulletin has been issues for this issue but for some reason it does not apply to my vin even though it is the exact same problem.

- Woodruff, SC, USA

problem #23

Jan 272023

Sierra 1500

  • 38,200 miles
The contact owns a 2019 GMC Sierra 1500. The contact stated that while performing an oil change, the engine coolant line was leaking oil. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was made aware of the failure. The contact related the failure to Customer Satisfaction Number: N212326940 (Engine Oil Cooler Lines Detaching from Crimp) however, the VIN was not included. The failure mileage was approximately 38,200.

- Old Bridge, NJ, USA

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