My truck had an afm collapsed lifter failure. It occurred under a hard acceleration event to change lanes. The dealer replaced the lifter, returning the vehicle to me. I got down the road, tested it under hard acceleration and it happened again! this time there was a lot of internal engine noise, really loud. I asked the dealer if they ntested it under a hard acceleration; they did not. They replaced the #6 piston and the valves associated with the #6 piston. All work performed was done on #6, even the initial collapsed lifter. I picked it up again and again a hard acceleration produced misfires! I had it towed it back to the dealer and asked them if they had tested it with hard acceleration. The response was @ 3300 RPM. I told the service writer that, if you do not test it under hard acceleration you will not even have it misfire! he redid the test and voila, he can see it now! technical resources told them to replace vlom, or "valve lifter oil manifold". I got it back and it does work, more or less. A hard acceleration will produce uneven acceleration but without the previous issues. I am working for now. I conducted some further research which I am probe to do and found an acdelco youtube video: Https://www.youtube.com/watch?V=mkly7xmmsos&feature=youtu.be&fbclid=iwar2zvzpvj6Z6E3seljzgvxzeru8ptllkgpkqtfxmrsns7oqencolhrrgi_I. This video states that if you have an afm levent that involves a collapsed lifter you must replace a plethora of parts. That was not done. I have changed my oil on a more frequent basis than GM requires and I use amsoil signature series10W20, the best you can buy! I also use their EA0 filters which state you can go up to 25K miles or 1 year between changes! I typically do 10K miles as a high point. I have swicthed preferred dealers to get a different technical response...help!

- Louisville, KY, USA

The contact owns a 2015 Silverado 1500. The contact stated that while operating the vehicle, there was an engine misfire prior to the vehicle stalling without warning. The failure had recurred on several occasions. The vehicle was taken to the local dealer mclarty danial Chevrolet (1159 N 45th St, springdale, ar 72762) and diagnosed that the engine valve lifters and fuel management systems were defective. The contact indicated that two valve lifters were replaced by the dealer. The failure continued after the vehicle was serviced. The manufacturer was notified of the failure. The VIN was not available. The failure mileage was 8,400.

- Rodgers, AR, USA

The contact owns a 2015 Chevrolet Silverado 1500. The contact stated that while driving at various speeds, there was an abnormal vibration coming from the front end of the vehicle. The vehicle was taken to kunes country Chevrolet-Cadillac, Inc. (1231 geneva St, delavan, wi 53115) where the contact was informed that there were no defects with the vehicle. The vehicle was returned unrepaired. The failure persisted and the vehicle was taken back to the same dealer and diagnosed with a defective rotor. The contact paid for the repair out of pocket. The manufacturer was not notified of the failure. The failure mileage was approximately 7,000.

- Janesville, WI, USA

Air conditoner isnt working there is many complaits for cracked lines and faulty brackets

- Santa Ana, CA, USA

I was on a family trip with my wife and kids and the engine temperature raised and system said to idle engine until it cooled down. I was able to cool the engine down and get the truck home. The Chevrolet dealer diagnosed a coolant leak at the radiator. Service bulletin pi1513F refers to this as being caused by a faulty thermostat which results in fractures in the radiator. "this condition may be the result of excessive thermocycles within the cooling system caused by excessive cycling of the thermostat. These excessive thermocycles within the coolant system may cause the tubes to fatigue, crack and leak at the radiator headers. To correct this condition, a new thermostat has been designed that eliminates the thermostats excessive cycling." The quoted cost to replace the radiator and thermostat at the dealer is $1800 GM has apparently extended the warranty to 100000 miles under a special coverage adjustment on the 2014 models, but not the other affected model years.

- Escondido, CA, USA

Often, when making low speed turns the entire engine and electrical system shuts off. There is no power steering when this happens and it's difficult and dangerous to try to coast to a safe spot to try to restart the vehicle. Generally, it starts back up again within a few minutes. In the three years that we've owned the vehicle, it has been to two different Chevy dealerships more than once and both dealerships say there's no problem. It's frustrating that it seems to be a common issue yet there's no answer to the problem and no recall.

- Jacksonville, FL, USA

This is a follow up from complaint #11228752 regarding the ac issues on Chevy &GMC pickups from 2014 thru 2017 year models. From research I did 98% of the failures was the condenser which also includes the transmission oil cooler. My condenser failed on the drivers side first 3 tubes below the transmission oil cooler as did my friends 2016 Sierra and another friend's 2016 Texas edition Sierra. Same failure same location and between 60 & 75K. Repaired mine myself & my warranty paid me back for new condenser ($219) but not the freon or my labor. There's most definitely an issue on this part and saw no visible difference in the old/ new piece other than a 6'X 6' square of aluminum type flex pad in the upper left corner on driver's side. Similar to the 2018 models not affected by this problem.

- Flowery Branch, GA, USA

Catalytic converter failed with less than 80,000 miles. The truck was taken to dealership, denooyer Chevrolet, from which it had been bought new and by which it had always been serviced to remedy the check engine light prior to 80,000 miles with authorization to perform any diagnostic and remediation covered under warranty. Dealer did not make repair and advised it would cost me hundreds of dollars to even find out what was wrong. I now have taken the truck to a separate shop for diagnosis and was told a catalytic converter has gone bad. However, I am now slightly at 89,000 miles. Dealer is saying warranty on catalytic converts expired at 80,000 miles. Front brake rotors warped within the first year of ownership. A/C cooling coil cracked under 80,000 miles as well due to a faulty part, and apparently that warranty expired at 30,000 miles.

- Mattawan, MI, USA

Rpms were rising above 6,000 without any power. Randomly while on highway, truck only had 112,000 miles on it and had to have a new transmission put in. And has had many other issues such as the lifters closing while on the highway and brake issues. The worst model truck ever made.

- Hampstead, NC, USA

It had a problem with the motor, at 50000 we bought it brand new. Dealer said it was a problem with some gaskets inside motor.

- Watsonville, CA, USA

Afm activated, lifter failure occurred. Engine cel blinks erratic engine behavior sudden loss of power and braking. Transmission starts shifting in and out of gears high low, severe bucking, high engine revving, cylinder misfire. Hard to stop very slow acceleration due to transmission in wrong gear and loss of power due to collapsed lifter. This is a major problem that GM is well aware of my 2007 Monte Carlo had same issue 8 years later the problem still exists. The vehicle is still under warranty and im sure they will cover the lifter all lifters should be replaced. And afm should be disabled.

- Kingston, NY, USA

The cabin of the vehicle fills with carbon monoxide. This is known because a 4 gas monitor in the vehicle read carbon monoxide levels in excess of 400 ppm. The source of the leak after being taken to the dealership was found to be a broken bolt in the exhaust manifold. The parts only estimate was $1,700 with approximately 9 labor hours. Online research found numerous complaints. Failure to correct the condition may lead to drivers fainting while driving and cause brain injury to a child or infant. A leak in the exhaust before reaching the catalytic converters also results in possibly excessive untreated emissions. The exhaust leak may or may not pose a fire hazard.

- Arlington, TX, USA

The contact owns a 2015 Chevrolet Silverado 1500. While driving 45-60 mph, the vehicle vibrated, shook, and struggled to accelerate. There were no warning indicators illuminated. The vehicle was taken to flow GM auto center of winston-salem (1400 S stratford rd, winston-salem, nc 27103, (336) 937-9049), but the failure could not be duplicated. The vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was 38,000.

- Jonesville, NC, USA

The contact owns a 2015 Chevrolet Silverado 1500. The contact stated that the steering wheel seized when turned and an alarm sounded. On several occasions, the steering failed and the vehicle stalled. The contact placed the gear into neutral and restared the engine immediately. The vehicle was taken to an unknown dealer where it was test driven, but the failure could not be duplicated. The manufacturer was not contacted. The failure mileage was 21,000.

- Pittston, PA, USA

The contact owns a 2015 Chevrolet Silverado 1500. The contact took the vehicle to karl tyler motors (675 N Montana St, dillon, mt 59725) to be repaired per NHTSA campaign number: 19V645000 (service brakes, hydraulic). The mechanic stated that the radiator leaked and needed replacement. The vehicle was not repaired. The manufacturer was notified of the failure and provided case number: 9-55994169837. The approximate failure mileage was 78,000.

- Dillon, MT, USA

The contact owns a 2015 Chevrolet Silverado 1500. While driving 5 mph and making a right turn, the vehicle seized and lost power without warning. When the vehicle was turned off and restarted, it resumed normal operation. The failure occurred three additional times while driving various speeds. The vehicle was taken to mark Chevrolet (33200 Michigan ave, wayne, mi 48184, (734) 307-0785) where it was diagnosed that the ECM needed to be updated. The vehicle was not repaired and the failure recurred. The manufacturer was made aware of the failure. The failure mileage was approximately 42,000.

- Belleville, MI, USA

The contact owns a 2015 Chevrolet Silverado 1500. While driving 10 mph, the steering seized and the vehicle stalled while turning into a neighborhood. Sellers Buick GMC (38000 grand river ave, farmington hills, mi 48335, (248) 579-8383) was contacted and stated that there were no recalls. The contact scheduled an appointment with the dealer to see if the vehicle could be repaired under an extended warranty. The manufacturer was not notified. The vehicle was not diagnosed or repaired. The failure mileage was 64,000.

- Garden City, MI, USA

The contact owns a 2015 Chevrolet Silverado 1500. While driving various speeds, the vehicle suddenly shut off while making a turn in either direction. The failure occurred on twelve separate occasions. The vehicle was taken to dave gill Chevrolet (4700 E. broad St, columbus, oh), but the cause of the failure was not determined. The manufacturer was notified of the failure. The VIN was not available. The failure mileage was 32,000.

- Westerville, OH, USA

The contact owns a 2015 Chevrolet Silverado 1500. The contact stated that the air conditioner was not functioning correctly. The vehicle was taken to an independent mechanic where it was diagnosed that the condenser needed to be repaired. The vehicle was not repaired. The contact was concerned for his safety if the failure were to occur during hot, inclement weather. The dealer and manufacturer were not notified. The failure mileage was 74,298.

- Nanticoke, PA, USA

Bad lifter causes engine failure at 100,006 miles. Engine had to be replaced. Transmission has extremely hard shifts from park to reverse, and slips between 5th and 6th. Doesn't throw any codes so dealer says it's fine.but it's obviously ruining itself. Reading all these transmissions complaints I can't believe it's not recalled

- Evergreen, CO, USA