It's a known problem with gmc with a lawsuit for the PVC pipes clogging and blowing the main rear oil seal causing the vehicle to quit running

- Lindsay, TX, USA

The contact owns a 2017 GMC Terrain. The contact stated that while her daughter was driving at an undisclosed speed, she observed white smoke coming from the vehicle, and the vehicle lost motive power. No warning lights were illuminated. The vehicle was taken to an independent mechanic, who determined that the vehicle was consuming an excessive amount of engine oil. The vehicle was not repaired. The vehicle was taken to another independent mechanic, who confirmed the diagnosis. The vehicle was not repaired. The manufacturer was notified of the failure but did not assist. The failure mileage was 125,000.

- Ames, IA, USA

I have to replace my rear drive shaft.

- Bolivar, NY, USA

Engine shut off while doing 70 mph on interstate. There was no warning signs or nothing.

- New Orleans , LA, USA

1. The car started making a noise then started surging and jerking. I'm not a mechanic, so I don't know what happened but it will not crank now. Yes, someone can come inspect the vehicle, by appointment only. 2. I was afraid that the car was going to blow up or the brakes would not hold. 3. No, the problem has not been reproduced or inspected. 4. No, the vehicle or component has not been inspected. 5. NO, there were no warning lights to let me know there was a problem.

- Anniston, AL, USA

We have had many GM vehicles my husband worked at GM retired now. Our complaint is we have a GMC Denali 2017 only 79000 miles on it. All upto date changes regularly all. Other like Transmission oil changed all upkeep to date. Transmission needs rebuilt. We are in our 80-??s And don-??t beat up our cars. Replace or rebuild transmission 3500 to 4500 bucks. That is a lot of money for us. No longer covered. It shudders when you drive at any speed and feels so unsafe. Took it to GM garage and they couldn-??t find anything wrong. No warning lights came on and we paid over 150 to have it checked out so with the shuddering getting worse and not feeling safe to drive we took it to a Transmission shop and he took it out and said the Shuddering was caused by something in the transmission. I have seen on google where GM is having a lot of problems in this area. We just need help with the repairs. Thank you. A retired GM worker Lordstown, Ohio [XXX]. Retired 1999 [XXX] INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

- Atwater, OH, USA

I was on the interstate, heading out of town. I heard a loud noise from under the car. The car started slowing down and would not accelerate. This could have been very dangerous if I had been in the middle of 5:00 traffic. I took the next exit in front of me and pulled into a gas station. Looked under car and seen no obvious damage. Got back in and the car and put it back into drive. It would barely pull and then quick pulling all together within a few feet. The D/drive light started flashing. No warnings at all before this happened. I was 200 miles away and had to have it towed back home. Put it in the GMC shop and was told it needed a transmission.

- Pickens, SC, USA

Due to cold weather the PCV froze which caused pressure to build up in the vehicle-??s crankcase which caused the rear main engine seal to pop out. Results in losing all engine oil without and warning driving down the highway. I was lucky enough to get off the highway but currently without a vehicle due to possible engine damage

- Wright City, MO, USA

Was driving on a highway on cruise control When it automatically disengaged by itself When I stepped on the gas the car began to shake violently, And it was not shifting years correctly. I was able to pull over and realize that the transmission Was a problem so I was able to drive manually to local dealer who diagnosed the problem as needing a new transmission. The vehicle is 2017 and has less than 63000 miles.

- Delran , NJ, USA

The rear main seal is out, which is causing an oil leak. The intake manifold failed because the pvc system has a clog which has caused too much pressure to build up and caused the rear main seal to blow out. (PVC pipe is freezing over in cold temperatures which causes the failure of the main seal to blow out subsequently leading to additional major issues and parts failure. This issue has occurred in an overwhelming amount of vehicles.)

- Macomb Township, MI, USA

2017 gmc Terrain. vin -[XXX] on 12-26-2023 milage - 80694 Catastrophic failure involving PCV Valve and blown seal that destroyed the motor. So...why or even how are we discussing rear main Seal. This is COMPLETELY UNACCEPTA, BLE. I have 2 kids starting to drive the repair estimate is $80 to $100 INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

- Reynoldsburg, OH, USA

The contact owns a 2017 GMC Terrain. The contact stated after stopping and shifting into park(P), the ignition switch could not be turned off and the key could not be removed from the ignition switch. While the contact was inspecting the rear of the vehicle, the vehicle started to roll backwards, almost injuring the contact. The vehicle was later driven to the local dealer who diagnosed that the control shifter was faulty and needed to be replaced. The vehicle was not yet repaired. The manufacturer was notified of the failure. The failure mileage was 41,000.

- Cincinnati, OH, USA

transmission jerking at low speeds no power, was told by dealer i need a new transmission i only have 60,000 miles on my 2017 terain gmc no warning indicator lights came

- Swansea, MA, USA

While driving on the highway with my child, vehicle suddenly went into reduced power mode. 5 minutes later after exiting the highway, the low oil pressure Alert came on. The vehicle was parked two minutes later then towed home. After towing it to my local certified dealership, it was determined the pcv was clogged with ice resulting in a blown rear main seal. There was a recall for a defect in earlier terrains for this same issue (See SB 14882). Currently GM will not cover repair costs under this specific recall despite this vehicle apparently having the same 2.4L Ecotek engine. Apparently this a known cold weather issue for this vehicle.

- Oak Lawn, IL, USA

My check engine light came on along with a a message that states 'reduced engine power' and a message reading 'service stabilitrek when I was driving on the highway at 70 mph. This created suddenly jerking and slow acceleration so that I had to pull off the road. I found a forum at [xxx] that reveals that this has been an issue with GMC modes at least as long as 2011. The duration for which this has been a problem with GMC models, and the fact that stabilitrek is an integral safety feature of the vehicle in avoiding accidents seems to merit a recall. Parts of this document have been redacted to protect personally identifiable information pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Rohnert Park, CA, USA

At around 20 miles per hour, while accelerating, all torque is lost and the vehicle engine revs high. It takes a few seconds, then the transmission finally shifts into the next gear. This causes a big jolt. It is dangerous, all power is lost, then suddenly too much power is applied. This has happened since I purchased the vehicle. I have taken it to the dealership. They won't do anything about it. The vehicle now has 40,502 miles.

- Albuquerque, NM, USA

I had my 2017 GMC Terrain denali for two years and have already experienced two serious issues. Issue #1-I noticed a burning smell, grinding noise, and hesitation when driving. I brought it to the dealership where I bought it and was told that there was a factory defect which caused something inside my transfer to bore a hole through it. Dealer could not get the part for 2 weeks. It was covered under my warranty. A month later while getting an oil change at a different auto shop, I was asked if I recently had work done only transmission because the entire thing was loose and moving, and the car did not drive right. I was told it was not safe to drive. I brought it back to the dealership and was told that they couldn't find anything. They tightened the bolts on the transfer case and charged me a $60 diagnostic fee (for their error). Issue #2-at 63,000 miles my wipers stopped working while I was driving at about 30mph on a busy street in the pouring rain (very scary). I brought it to the dealership and was told I needed a new wiper transmission and would cost $318 because my car was not part of the recall. I expressed concern that my 2yo. Car has now had two serious safety issues and was told 'cars have so many moving parts and pieces that it's a wonder more things weren't wrong with it'. I do not feel safe driving this car and the service manager was condescending and couldn't care less. GMC needs to do something before somebody gets seriously hurt or worse.

- Pepperell, MA, USA