2015 Chevrolet Silverado Powertrain & Transmission Problems

Vehicle transmission repaired at 77,000 along with a new torque converter. Torque converter and transmission both failed again at 115,000 miles. GMC currently replacing the 3rd torque converter with 130,000 miles. I have spent over $14,000 on 2 transmissions and 3 torque converters on a vehicle I've owned for 6 years.

While driving at highway cruising speeds, the vehicle began showing abnormal RPM fluctuation/surging at steady speed. The RPM would repeatedly move up and down even while maintaining a constant speed, including when cruise control was used. There were no warning lights or dashboard messages at the time the symptoms first appeared. The suspected failure is the torque converter/torque converter clutch in the automatic transmission. After diagnosis, I was advised that the torque converter failure contaminated the transmission fluid/internal transmission components, and that the transmission now requires replacement. The failed transmission/related components may be available for inspection upon request, depending on repair timing. This condition created a safety concern because the drivetrain was not operating normally at highway speeds, causing inconsistent power delivery and concern that the transmission could slip, overheat, fail further, or leave the vehicle unable to maintain speed in traffic. A sudden loss of propulsion or worsening transmission failure could increase the risk of a crash. The problem has been diagnosed by a transmission repair facility. The vehicle has not been inspected by the manufacturer, police, or insurance representatives. No crash occurred. No injuries occurred. No warning lamps appeared before the failure. The first noticeable symptom was the RPM flutter/surging at steady highway cruising speed. The exact internal cause is unknown, but the best assessment is torque converter/torque converter clutch failure resulting in contamination and failure of the transmission.

When slowing down, just before coming to a complete stop, the transmission will downshift, clunk and the vehicle will jump forward, powering through the brake pressure that's already applied, to the point I have almost collided with the vehicle in front of me. This incident has occurred numerous times over the years since vehicle was purchased new.

Transmission shuttered while driving on the freeway at 65 mph, the rpm dial indicator show high and my speed dropped to 40 mph. The transmission fluid was burnt and the torque converter was replaced

After years of driving like a grandma, my transmission unexpectedly failed while travelling down the freeway at 70mph. There were no warning signs, no vibrations, and I changed my transmission fluid at the dealer-recommended intervals. Huge bummer, really. I use my truck for work, and because of the time of year, it is unlikely that I'll be able to get it repaired for a few weeks. Certainly not going to help my bank account either, since a new transmission from Chevrolet is $4,800 before labor and other parts.

I was driving on a busy street with a speed limit of around 45 mph and my torque converter failed causing my transmission to fail and my truck to become disabled in the middle of a busy road. It blocked traffic causing a potential danger to surrounding motorists and required assistance to be moved to a nearby parkin lot and later to be towed to the Chevrolet Dealership. The dealership confirmed that the transmission had failed. I subsequently took it to a specialist transmission shop that dismantled it an indicated that the torque converter had failed (a known problem with this year and model transmission) and that the failure had led to catastrophic damage to the transmission. There were no warning signs other than a couple of hard shifts just prior to failure. I was lucky that this occurred on a dry level street and not on a narrow mountain pass while pulling a trailer where the results could have been much different.

At 144k I had to replace the passenger lifters because cylender 8 (linked to AFM) was stuck. I got that repaired. At 147k I had to get my passenger side lifters replaced again. 2 months later at about 152k I had to replace drivers side lifters. At this point 152k ive had all lifters replaced. Passenger side twice. Now at 157k my bottom end is bad. I was driving and boom no power. That could of been bad. Ive spent so god damn much money on this truck due to the AFM. Its ridiculous. Now I have to spend 8k on a new engine. Ive spent a total of 12k in repairs to this truck. There has to be something done to compensate. Because of your guyses shitty engineering im going into debt. Its insane

I purchased this vehicle brand new. From day one I have had constant transmission related issues that make it feel unsafe and unreliable. When it was still under the factory warranty it was brought back to dealer multiple times. Each time I was told it's a normal characteristic of that transmission or that a simple fluid flush would fix it. It was flushed a couple of times and it would "help" for a short while. Software for the transmission control module was updated by dealer. Nothing that was done ever actually fixed the issues. The transmission bucks, jerks, clunks when up & down shifting. Lunges forward when almost to a complete stop. Shudders at higher speeds above 45-50 mph. Occasionally if I slow down from cruising speed and press accelerator to speed back up, it doesn't accelerate because it won't shift down from the higher gear it was in.

Transmission just won’t last in this truck and it’s dangerous when you have kids in it

The contact owns a 2015 Chevrolet Silverado LD Crew. The contact stated that while driving and going up hill, the vehicle will not accelerate over 60 mph. when the vehicle goes down hill the RPMs rapidly increase. When driving on a straight road, the vehicle hesitated to move forward. The vehicle was taken to the dealer for diagnosis and it was not able to be duplicated. The vehicle was not repaired. The manufacturer was notified of the issue. The approximate failure mileage was 145,000.

2015 5.3 with afm related failure / lifter collapse still within warranty by mileage (5 yrs, 100,000 miles I think), out by years in service, was diagnosed by a GM authorized dealership by a GM Master Certified Technician and under the supervision of service manager. Issue Description On 6/18/2025, the dealership diagnosed a failure in the #7 lifter due to afm / afm related failure / lifter collapse. The vehicle’s engine, diagnosed at approximately 58,000 miles and minimal idle hours. While the GM Master technician is confident that only one side of lifters require immediate replacement, there is a possibility of damage to the camshaft lobe, which cannot be inspected without significant additional labor. There is also a concern about potential metal contamination in the oil, which could further impact the engine’s performance. I also have many documented repair orders indicating my concern with the transmissions performance.

For years I have taken my truck in to see why it is grinding when shifting and was told it was nothing. Now it got so bad my truck completely lost the ability to accelerate at all. The records I had at James Corlew have been lost since they changed to a new owner. I have spent over 7000 to get this fixed

My engine shakes when shifting into the V4 from the V6 and my transmission shifts hard as well as a dieseling affect when shifting from 2nd gear to 3rd gear. Rear main seal was replaced 1000 miles ago and now has to be replaced again due to the rapid shaking of the V4 cylinder deactivation(which was a terrible way to make the reliable 4.3 Lt engine unreliable)

Experienced a problem with electrical theft deterrent system and it shut the vehicle off while driving. I tried to start the vehicle and nothing happened except it said theft deterrent system. I took the key out tried starting again and it turned over immediately. The dash said theft deterrent and I clicked dismiss but the dash icon (a car with a lock light) remained on. I then drove 11 miles home. I turned on my directional proceeded to brake upon approaching my driveway. As I attempted to turn the steering wheel the vehicle completely shut off. The info system stating theft deterrent active. I lost power steering and brakes. I needed to press the brakes with great force because the vehicle was headed towards the sidewalk and a road sign. Steering was virtually unresponsive. Vehicle stopped as the tires reached the curb and approximately 1 ft from the sign. Placed vehicle in park and started it back up. Pulled into my driveway and the info system stated I need to roll the drivers window down and the up to deactivate. I have checked all battery connections are intact and tight. The battery, starter and alternator were all checked and fine. I have no idea what caused this dangerous behavior. The incident happened on MA Rt. 126 988 S. Main st Bellingham MA 02019

The valve body on my transmission failed and needs to be repaired again. It was already replaced by gm, 1k miles later it failed again.

Transmission failure at 133,000 miles due to faulty tourque converter … which was replaced AFTER … i repeat AFTER… replacing all components that failed because of the faulty torque converter … so now its showing same symptoms as did before failed … only 30,000 since repairs

The torque converter with the 6L80 transmission went and destroyed the transmission in my 2015 Silverado. Which is going to cost me thousands of dollars to fix. With the 10's of thousands of people affected, Chevy should of done a recall on the torque converter and/or transmission. There were no signs/symptoms, the truck started shaking like I was driving over rumble strips, no check engine light. I was able to get it to a mechanic immediately and it sits there unusable at this time.

Transmission failing when going up hill almost causing a wreck and leaving me stranded. Was inspected by dealership and they rebuilt the transmission problem keeps occurring. No warning lamps. Have spoken with other Chevy Silverado of same year and style and many have had the same issue.

The contact owns a 2015 Chevrolet Silverado 1500. The contact stated that while driving at an undisclosed speed, the vehicle briefly shuddered before losing motive power. The contact was able to coast to the shoulder of the roadway, where the failure persisted. No warning lights were illuminated. The vehicle was taken to an independent mechanic, who determined that the transmission required a flush and fluid replacement. The vehicle was repaired, but the failure reoccurred. The manufacturer was not notified of the failure. The failure mileage was 132,000.

In the middle of driving the truck stopped working and wouldn't accelerate. No light for the engine was on and no warning. Truck won't restart