Crankcase (pcv) Problems of GMC Terrain - part 1

I am reporting excessive oil consumption in my 2016 GMC Terrain with the 2. 4l ecotec engine. The vehicle burns through an abnormal amount of oil between routine oil changes, often requiring additional oil changes without any visible leaks or dashboard warnings until the oil level is dangerously low. This issue has been diagnosed by a certified GMC dealership, but the repair was not covered under warranty. I’ve learned this is a known and widespread defect related to faulty piston rings and pcv system issues in this engine model, which has led to engine damage or failure in many cases. GMC has not issued a recall for my VIN, and my request for goodwill assistance was denied despite the safety risk of low oil pressure and potential engine failure while driving. I believe this issue poses a safety concern and warrants formal investigation and potential recall expansion.

See all problems of the 2016 GMC Terrain 🔎.

Catastrophic mechanical failure; engine failure. Below freezing day driving normally until the car just died right in the middle of a busy 4 lane road. No warning lights were displayed. Luckily I was able to drift the car over to the curb lane then manually push into a parking lot with cars driving around me. Vehicle taken to independent auto care service which did an inspection stating the pcv valve was frozen which then caused the pressure to blow rear seal and metal fragments could be seen in the oil drippings. No issues or dashboard notifications prior to this event.

See all problems of the 2015 GMC Terrain 🔎.

Details: frozen/clogged pcv in the intake manifold caused the rear main seal to burst due to crankcase pressure, leading to complete engine failure. The 2. 4 ecotech engine must be entirely replaced. GMC refuses to act despite being well aware of this consistent issue. There is a class action lawsuit, service bulletins and multiple examples of this scenario all over the internet. Resolution needed ASAP. - 1/20/while driving home from my night shift at highway speeds, exhaust fumes entered the cabin, followed by a loud pop and sudden engine failure. The check engine light never came on and the vehicle would not restart. After towing to the dealership, they confirmed what occurred and noted that it happened on the coldest night of the year, consistent with the well-documented defect in the 2. 4l ecotech engine. They estimated replacement cost can run up to $10,000 and is my responsibility, advising that gm takes no liability for this known issue. This is not an isolated incident for this engine. Gm is fully aware of this defect evidenced by multiple service bulletins, including TSB GMC 19-na-021, which explicitly states this issue is known for all 2010-2017 GMC Terrains. Despite this when I called gm for a resolution, I was told my VIN is somehow excluded, making me ineligible for assistance. Instead of taking responsibility, gm directed me to NHTSA, claiming they alone can update affected vins. This is NHTSA and gm’s failure, not mine. - this situation is completely unacceptable. Gm must immediately resolve this issue in one of the following ways: 1. Full engine replacement at no cost to me. 2. Complete payoff of my remaining loan balance. Additionally, NHTSA must provide an explanation for why my VIN is not included in their list of affected vehicles and correct this oversight immediately. - I will not accept further delays, deflection, or excuses. Gm must take full responsibility for this failure and respond immediately with a resolution.

See all problems of the 2017 GMC Terrain 🔎.

While driving home from work in single digit temperatures on Monday 01/20/25 the engine of my 2017 GMC Terrain stalled without warning at a traffic light. I was able to restart the vehicle and drive it the 1. 5 miles home. When I exited the vehicle I noticed a trail of oil leading up the driveway into the garage. Oil continued to leak from the vehicle in the garage, and we had it towed the next day. Righter’s auto repair found the rear main seal had blown due to a frozen pcv system that GMC is well aware of and subject to TSB 5093c. The vehicle only has 64,856 miles.

I was driving my vehicle to the gym when I noticed it was driving weird, it would not accelerate like normal, was having a hard time getting going and was making a weird noise. I had just put some oil in the car because we had known for a little while that it had a problem with burning oil because of the make and model (as told by other mechanics previously), when I got to the gym I heard a pop noise and the car stalled on me, I eventually got it started up again after 2 hours of being stranded at the gym. The next day I had to drive 40 minutes away for nursing school clincial where on the way home it was back to driving weird and making a loud horrible noise from the engine. I was only 5 minutes from home when it was really bad and once there I noticed the burning smell from the engine. When I checked the oil level after an hour and half of cooling down I could not get any oil reading on the dipstick, after adding almost 4 quarts there was still no reading on the dipstick. We finally drove the car to my mechanic (8 minutes away) and it was already back to making the loud noise, having trouble accelerating, and producing the foul odor. I was told the pcv was restricted and caused the engine to over pressurize and that lead to the main rear bursting and all the oil in my car being thrown over the entire underside and probably the roads. They also checked the oil filter in the car to see if the engine itself was salvageable, where they found metal flakes in the oil filter and deemed the engine failed and are saying the engine needs replaced in order to fix the car I’ve had for 15 months… I’m still paying this car off and I have only driven it for less than 17,000 miles. It is a 2016 GMC Terrain that only has 91k miles, I truly hope gm makes this right seeing as so many have come with the same exact problem due to poor design and vehicle quality. My car has had regular oil changes and I check the oil every week because of the prior burning problem.

The contact owns a 2014 GMC Terrain. The contact stated that while his wife was driving at an undisclosed speed, the vehicle stalled. The contact stated that his wife was not aware of any warning lights being illuminated. The contact stated that his wife was unable to restart the vehicle, and had the vehicle towed to the residence. The contact called an independent mechanic to the residence who diagnosed the vehicle and determined that there was oil leaking into the engine block and cylinders. The mechanic determined that the positive crankcase valve (pcv) had failed and needed to be replaced, and that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was informed of the failure. The failure mileage was approximately 105,000.

See all problems of the 2014 GMC Terrain 🔎.

The rear main seal for the engine fails because of a clogged pcv valve. This was a problem on previous years for the Terrain and other vehicles that carried a similar type of engine. There was a recall for those previous years (2011-2014). My vehicle is a 2015 GMC Terrain, and I am currently experiencing the same issue. I took my vehicle to a licensed dealership and they quoted me a price of close to $3,000 to make the necessary repairs. In my opinion, since the same issue/problem is occurring, there should be a recall issued to include at least the 2015 year models for that engine.

In certain makes of general motor vehicles there is a defect with the pcv system in which the system can freeze in cold temperatures which in turns causes excessive crankcase pressure in the engine, and can lead to a dangerous loss of motor power due to this defect. The dangers of this defect can be catastrophic to myself and others on the roadway as the loss of motor power can happen suddenly and can happen while the vehicle is being driven. General motors has released many service bulletins regarding this specific defect. The most recent service bulletin that was issued was gm January 2019 bulletin pip5093c, so they are aware of this dangerous problem in these vehicles. For my vehicle I have had a certified GMC dealership diagnosis the problem, and submit their findings to general motors. There were not any warning lamps, messages, lights, or symptoms signaling that there was a problem prior to the occurrence on January 15th, 2024.

I was driving our 2017 GMC Terrain in subzero temperatures when my vehicle started making sounds and loosing power. With in seconds I heard a pop, and then my dash went crazy with alarms. I had it towed to my local mechanic who determined that the vehicle's engine was seized do to a frozen pcv valve that caused the engines real seal to give away. If need be, the the vehicle is currently available to be examined. My family's safety was in danger because of the location and frigid temperatures that were present at the time of the breakage. The vehicle has not been examine by a GMC dealer, just an independent mechanic. There was no warning what so ever of a possible problem. The vehicle started making sounds and loosing power. With in seconds, I heard a pop and all the lights on the dash light up. We had no other issues with this vehicle leading up to the breakage.

The contact owns a 2015 GMC Terrain. The contact stated while driving 70 mph with cruise control activated, the rpm suddenly increased to redline, after which the vehicle lost motive power. The contact was able to coast to the shoulder of the roadway, where the vehicle failed to restart. No warning lights were illuminated. The vehicle was towed to the dealer, who diagnosed a failure with the positive crankcase ventilation (pcv) valve, which then caused a failure with the front crank seal, resulting in damage to the engine. The contact was informed that the engine needed to be replaced. The vehicle was repaired. After investigating the failure, the contact related the failure to NHTSA action number: pe25001 (engine, engine and engine cooling). The manufacturer was notified of the failure but provided no assistance. The failure mileage was 148,000.

2017 GMC Terrain. VIN -2gkalmek3h6320983 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 $8. 000 to $10. 000.

I was driving my 2013 GMC Terrain to a friends house, I stopped at a stop light, when I picked up speed, the car stalled and wouldn't get up to speed. Eventually, it did pick up speed. I went to turn into her neighborhood and the same thing happened. Trying to get to the destination, I continued into the neighborhood. I stopped at a stop sign, and when I tried to accelerate, the car died. No indicator lights were engaged. I turned the car off and waited a minute or so and turned it back on. I got to her house, and charged my battery and drove home without issue. The next day, I went to have my battery checked and they alerted me to a horrible oil leak. I had the car towed to the dealership. The next day, the dealership told me that GMC would specifically have to look at the vehicle to diagnose. I had the car towed to my trusted mechanic and he told me the rear main oil seal blew out and found a service bulletin regarding this issue #14882. I made an appointment with the dealership only to find out that this isn't covered under the bulletin, because it expired in November of 2022, and it's not covered under my warranty. The warranty company stated, "if there isn't evidence of moisture in the pcv it would be covered, but since it's a known issue and a consistent problem with the vehicle, it's not covered. " so, my only choice is to pay out of pocket for a defective part that will continue to break and cause the rear main oil seal to blow out of the car, potentially putting me and my 9 year old daughter at risk, because GMC isn't acknowledging this issue and recalling the faulty part that is the root of the problem and has been widely reported. There is also a class action lawsuit that is currently open and ongoing (case 2:22-cv-10785-mag-jjcg) which is trying to hold GMC responsible for not recalling the part sooner - when they were made aware of it - putting thousands of consumers at risk. It's also fraudulent for this information to not be disclosed at point of sale.

See all problems of the 2013 GMC Terrain 🔎.

2015 GMC Terrain-the pcv system or rear engine seal froze and burst. It happened last month when GA experience record cold weather. When the vehicle’s pcv system freezes it caused pressure to build up in the vehicle’s crankcase that breaks or pops out the rear main engine seal and caused all of the oil to drain from the vehicle while driving. The engine has completely seized and will need to be replaced. There are several bulletins issues about this but no recall. After researching I see there has been a few class action suits filed within the past 12 months. This apparently has happened to quite a few people. I am now up to over 9k total. The pcv repair was 2800, then the timing chains 1800, only to find out that the engine suffered as well. New engine 4500. Please do something about this.

It was christmas weekend, the coldest days our area had seen this time of year in decades. Temperatures were around 0 degrees, with wind chills that were -25 below. The check engine light had come on the day before. My husband was literally driving to the mechanic to have it looked at, when the vehicle completely broke down across the street from his destination. Thank god he was approaching an intersection when it died, and not traveling at a higher rate of speed, where he could have been injured, or others on the roadway around him could have been injured. We had the vehicle towed to our GMC dealership where we purchased it just three years prior. Upon inspection from the mechanic, it was determined that the pcv valve was plugged causing pressure on the rear main seal, which then blew out, bending the valve covers, breaking the timing chain, the water pump chain, and damaging the head gasket. The whole bottom of the motor was covered in oil. Absolute catastrophic damage!! I’m told the cost to replace these parts to essentially rebuild the engine, would start at approximately $4000. A brand new engine would be about $11,000! this entire situation to me is just unbelievable! a five year old gm vehicle, with just 46,000 miles on it! this should not have happened. In researching, I’ve been made aware that this is a common issue with GMC Terrains. In fact there was technical service bulletin made by gm for 2010-2013 models whose pcv valve would clog causing rear main seal blow outs. The holes were so small in diameter, technicians would use a 1/16 drill head to clean it out. This is an obvious manufacturer defect that apparently hasn’t been resolved in the newer model Terrains. How has this not been a safety recall yet?? shame on you gm! this will be the last GMC vehicle I will own!.

The contact owns a 2014 GMC Terrain. The contact stated that while driving at various speeds, oil had drained from the vehicle. There were no warning indicator lights illuminated. The vehicle was taken to the local dealer where it was diagnosed the pcv froze and caused oil to leak from the vehicle. The vehicle was not repaired. The manufacturer was not contacted regarding the failure. The failure mileage was approximately 79,000.

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.

As I was driving on December 24, 2022, (the temperature outside was 7 degrees). I heard my vehicle making a funny sound. I pulled over to a safe location then my truck cut off by itself. I got out of my truck and noticed that oil was on the back of the rear tire wall and on the ground. I had to get it towed to a repair shop. They told me a couple days later that the pcv valve was gone and that caused the rear main seal to go bad. Several days later, I happen to see a recall on youtube about the pcv valve that GMC had issued back in March 2015, but I never received a letter through the mail. To get this fixed it’s gonna cause me a lot of money. Unless GMC is willing to pay for it.

See all problems of the 2012 GMC Terrain 🔎.

Car died out of nowhere. Towed to dealership. Upon inspection we were told that the engine needs to be replaced. Had a 3rd party come to investigate and gave a diagnostic report. Gm has notices and there are articles outlining the defect/failure of the engine due to excessive oil consumption and issues with pcv and rear main seal.

The contact owns a 2014 GMC Terrain. The contact stated that the oil gauge failed to display when the oil level was low. The contact heard a rattling noise coming from underneath the hood of the vehicle. The check engine warning light was illuminated. The contact stated that oil had to be added between 800 - 1,000 miles. The contact took the vehicle to a certified mechanic who replaced the pcv valve however, the failure persisted. The vehicle then displayed a timing chain code. The contact took the vehicle to two different dealers who diagnosed the vehicle and determined that the piston rings had failed. The contact was informed that the timing chain, pistons, and pistons rings needed to be replaced. The vehicle had not been repaired. The manufacturer was made aware of the failure and opened a case. The approximate failure mileage was 68,500.

Check engine light on took to dealer and they ran diagnostic. Timing chain is also on its way out. I am the original owner. "water in pcv system obstruction in the secondary air system. " I had this cleaned out a few years ago $500. 00. If the pcv freezes without warning, the engine will seize. No warning for pcv, just visual inspection from tech at dealer.

The contact owns a 2017 GMC Terrain. The contact stated that after his wife had parked the vehicle, the oil light appeared on the instrument panel. Upon exiting the vehicle, she discovered that oil had leaked onto the ground from underneath the vehicle. The contact was called to the scene and placed oil into the vehicle; however, the oil leaked out after restarting the vehicle. The contact then called a friend who was a mechanic and he discovered that the pcv valve had frozen which caused the rear main seal to fracture. The contact also discovered that oil spilled all over the bottom of the engine. The dealer was notified of the failure and informed him that there were no recalls. The manufacturer was also notified of the failure and referred him to NHTSA. The vehicle had yet to be repaired. The failure mileage was approximately 80,000.

My pcv failed the winter of 2021. It blew the rear main. My Terrain has been parked since then.

Due to a faulty pcv design my vehicle experienced a rear main seal failure. It was externally cold. The same as in bulletin 14882. GMC states that my vehicle is not covered.

See all problems of the 2011 GMC Terrain 🔎.

While driving on the interstate in below freezing weather the low oil pressure light illuminated directing me to stop the vehicle immediately. After waiting 2 hours in freezing temperatures I was able to get vehicle towed to a mechanic and the rear main oil seal had blow out due to a blocked pcv valve. This is a know issue up to 2013 GMC Terrains and mine is 2014. Pictures from the special coverage bulletin 14882 looks like identical part still used in the 2014.

The contact owns a 2016 GMC Terrain. The contact stated that while driving 40 mph, there was and abnormal clicking sound coming from the engine. The vehicle was later towed from his residence to an independent mechanic, where the vehicle was diagnosed with a blocked pcv valve which caused the rear main seal failure. The mechanic informed the contact that the clicking sound was from the oil draining at a rapid speed and that the engine needed to be replaced. The contact then called mauer Chevrolet (1055 50th st e, inver grove heights, mn 55077) and was informed of an upcharge for the engine replacement. The contact also called the manufacturer, and was informed that the vehicle needed to be diagnosed by an authorized GMC dealer. The vehicle was not repaired. The approximate failure mileage was 70,000.

2013 Terrain started shaking while my 16 year old daughter was driving it on the highway. She brought it home and parked it. Then it started leaking oil. On 2/15/21, we had the Terrain towed to the local gm dealership. Service manager, fred, said the rear main seal blew out caused from too much pressure due to frozen/plugged pcv. Gm service bulletin 14882 describes this issue. On 2/19/21 at 3:15pm, fred stated on a recorded call with me and gm customer service that the Terrain's �problems are exactly as described in the bulletin� but gm refuses to cover the cost to repair my 2013 Terrain with 99,500 miles. Gm first agreed to pay $500 toward the cost of the repair, but has since reduced the amount to $200. This is a gm design flaw that causes engine damage. Gm customers should not be responsible for paying for a repair caused by the negligence of the manufacturer.

Left my house on a very cold morning (below 10 degrees) and while I was driving and my engine started making a very loud clattering noise. Low power message displayed on the dash and several lights displayed. Nothing prior to the noise. Immediately pulled in and parked my vehicle. I had the codes ran, checked the oil and it had none! the vehicle was checked out and the pcv valve failed/froze causing combustion in the engine and blew out the rear main seal. According to service bulletin 14882 this was an issue on the 2010-2013 GMC Terrains and 2010-2014 Chevrolet equinox (which is basically the same thing) a recall was issued. My vehicle is a 2014 (who's to say when the engine was not built in 2013?) and it doesn't appear the issue was fixed on the 2014s which is going to cost me approximately $3000 to fix. When the rear main seal blew (or started leaking) it coated the whole underside of my vehicle which could have cause me to wreck or catch fire. I had to have my vehicle towed since I was several miles from home.

Pcv valve froze causing rear crankshaft seal to fail. Engine needed to ne replaced. Gm won't honor sb 14882. Car started to run sluggish in cold weather. Stalled and restarted. Parked in driveway overnight in 6 degree weather. Would not start. Oil qall over driveway.

During cold temperatures (14 degrees) my pcv valve failed to work while sitting at a read light while I was driving home from work on a city street resulting in my rear main seal blowing. This was an issue on the 2010-2013 GMC Terrains and other gm vehicles as noted in the service bulletin 14882. My car is a 2014 and clearly the issue has not been resolved which has cost me nearly $3000 in repairs. Luckily I was close to home but this issue could've left me stranded in below freezing temperatures. This issue also caused oil to leak everywhere and could've resulted in a fire. My car was smoking and smelled as though something was burning.

Driving my 2013 GMC terrein (2. 4l) it was about 20 degrees out, a warning light came on that oil pressure is low "stop engine immediately. I pulled over at a gas station and as got out of the car I could see a oil spilling from below the engine. I had it towed to my mechanic and he said it had a a rear crankshaft seal oil leak. I had received an extended warranty bulletin 14882 which GMC recognize the issue. This special coverage covers the condition (2010-2013 GMC Terrain vehicles equipped with a 2. 4l engine (laf, lea or luk) that have experienced high oil consumption may also experience a frozen and/or plugged pcv (positive crankcase ventilation) system during cold weather operation. This condition may increase crankcase pressure leading to a rear crankshaft seal oil leak) for a period of 10 years or 120,000 miles (193,000 km), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership. My car is a 2013 GMC Terrain with 119,000 mile and should qualify for the extended warranty. I called the GMC customer service and I was told that my VIN doesn't qualify and the dealer is asking for $3500 for repairs. My mechanic did the repairs for $1500 but GMC will not reimburse.

Tl the contact owns a 2014 GMC Terrain. The contact stated that while his wife was driving at an undisclosed speed, the vehicle stalled with the check engine and low oil pressure warning light illuminated. Additionally, there was a message flashing on the instrument panel with a message to turn off the vehicle. The driver pulled over and turned of the vehicle. The vehicle was towed to an independent mechanic to be diagnosed. The contact was informed that the rear main seal was blown due to excessive crankcase pressure. There was also a minimal amount of oil in the engine. The mechanic informed the contact of TSB: 14882 and 19na021. Robert brogden Buick GMC (1500 e. Santa fe st. , olathe, KS 66061 (913)782-1500) was contacted and stated the VIN was not under recall. The contact was informed to tow the vehicle to be diagnosed. The vehicle was repaired at an independent mechanic. The manufacturer was made aware of the failure. The failure mileage was 107,298.

I took vehicle in for a known oil consumption issue. The dealer check my oil and confirmed no active leaks. The next day a large oil leak appeared. The proximity of the two were purely coincidence. The dealer, after further review, uncovered a rear main seal failure due to a frozen pcv. This issue is documented in TSB 14882 however my vehicle's VIN is specifically excluded. Again my vehicle meets all of the requirements of TSB 14882. I am specifically looking to have the TSB expanded to include my vehicle and other similar vehicles.

My pcv valve clogged and caused the rear main seal to blow out. This is a common known problem with this vehicle and gm has recalled certain vins with the same issue and the same engine. Now my car is at the dealership having $1200 worth of work done that could have been prevented with a $12 part. I just had my vehicle at a gm certified shop 7 months ago for warranty work and was not notified of this possible problem.

I have a leaking rear main seal. This should be covered under gm bulletin 14882. I had a gm technician inspect the vehicle at glockners Chevrolet and GMC dealer in portsmouth, ohio. He said the deal is leaking do to a clogged pcv valve. This is the very thing covered in the bulletin but they refuse to fix it because the VIN does not match. This is happening on numerous gm vehicles with this engine it should be covered under warranty. The temperature has been below freezing her for the last couple days. I drove the vehicle approximately 10 miles from work to the dealership.

This car burns 3 quarts of oil between 5000 mile oil change intervals. It has done it since it was new. I just found out it is because of a faulty pcv system. 01.