2015 Chevrolet Silverado 1500 transmission problems

Filed Oct 8, 2026 · Engine, Transmission · IL

A lifter failed and caused an injector to fail and a push rod to bend. The truck has misfires on two cylinders now. The AFM system is a large issue known for 2014 and newer 1500 trucks as mine is a 2015. The truck is in need of a motor rebuild or replacement and the dealer I took the truck to for the work quoted me over $9000 for the work to be completed. The engine has less then 125,000 miles on it.

Filed Sep 29, 2026 · Brakes, Transmission · TN

At 124,000, the transmission started slipping and not grabbing gears. Coleman Taylor Transmissions ended up having to do a full rebuild which costs about $4000. At around 20,000 miles, the vehicle started to shutter going 45 mph. The vehicle still does shake violently at 62-75 mph causing a safety concern. The brakes wont go if Ive been standing still for a long time like in a drive through or backing down a boat ramp. You have to stand on the brakes with both feet to get the vehicle to stop and thats only going 5 mph. We still own this vehicle and still have issues with it.

Filed Sep 15, 2026 · Engine, Transmission · IN

I am filing this complaint regarding a serious engine lifter/Active Fuel Management (AFM) failure in my 2015 Chevrolet Silverado 1500. The vehicle experienced a lifter failure that caused significant engine problems and created a potential safety concern while driving back from shopping: loss of power, engine misfire, severe shaking, ticking, check-engine light, stalling, inability to maintain speed, etc. The vehicle had approximately 200k miles at the time of the failure. The vehicle was inspected by a local mechanic, which diagnosed the problem as collapsed/failed lifter. The repair required/will cost approx. 3k or more estimated My concern is that this does not appear to be an isolated failure. Other owners of 2015 Chevrolet Silverado 1500 trucks equipped with GM's Active Fuel Management system have reported lifter failures, including failures resulting in engine damage and sudden loss of engine power or propulsion. A sudden lifter or related engine failure can create a significant safety hazard, particularly when it occurs at highway speeds, while merging into traffic, crossing an intersection, or in another situation where the driver depends upon the engine to maintain acceleration and vehicle speed. I am reporting this in hopes that GM can be held accountable as they knew about these defective lifters but did nothing but hide it.

Filed Aug 28, 2026 · Transmission · CT

January of last year, I was driving, coming off the highway, my engine came on and the system send to shutdown immediatly. I was close enough to my machanic, upon inspection, the AFM System failed at only 76,622 miles. This is part of the building issues with this value lifter problem I wanted to document it with the federal safety agency as you are actively opening case for this ongoing issue with GM. i am hoping that a class action law suit will hopfully gain traction. this was a know issue, i was outside of standard warrenty, I was forced to replace the engine out of my own pocket to avoid having a truck worth almost nothing. I will bring this up with GM corporate also, reciept uploaded. Millions of 2014-present trucks and SUVs, while federal investigations specifically target nearly 878,000 to 1 million newer vehicles (2019–2026). GM should be helad accountable

Filed Jul 26, 2026 · Transmission · IN

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

Filed Jul 17, 2026 · Transmission · SC

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.

Filed Jul 5, 2026 · Transmission · MN

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

Filed Jun 24, 2026 · Transmission · MI

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.

Filed May 19, 2026 · Transmission · KS

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.

Filed May 19, 2026 · Transmission · KS

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.