My 2024 GMC Sierra’s Transmission Died at 6,500 Miles, I’ve Been Waiting For the Dealer To Get Parts For Over 60 Days

A 2024 GMC Sierra owner has a failed 10-speed transmission that is only 6,500 miles in. The truck needs a new transmission, but the dealer doesn't have the right parts. Here is Matheus's frustrating story and what Sierra owners need to know.

Another GM 10-speed transmission bites the dust.

Imagine owning a new GMC Sierra pickup with only 6,500 miles on it. Your transmission failed, and now your truck has been at the dealer for over 60 days.

Matheus Picceli, a proud owner of a 2024 GMC Sierra SLT 5.3-liter 1500 5.3-liter with a 10-speed transmission, shared his story of a failed transmission on the GMC Sierra Owner's Facebook page. His experience is not unique, as many other 2024 GMC Sierra and 2024 Chevrolet Silverado owners are facing similar issues.

He says, "My 2024 GMC Sierra SLT 5.3L V8 (6,500 miles) has been waiting on transmission parts for over 60 days. I've filed a claim through BBB Autoline, but GM is delaying the process."

"I'm reaching out to see if anyone knows about a class-action lawsuit related to the 10-speed transmission."

This Is Not An Isolated Problem

I recently wrote a report on a 2024 Chevrolet Silverado owner with a failed 10-speed transmission with only 11K miles. Check out Rachel's frustrating story here. She was on a road trip when her transmission failed, leaving her stranded in the middle of nowhere.

What are Other GMC Sierra Owners Saying?

Katie Szymanski - The same thing happened to me; on January 9, 2025, I towed the truck to the dealership. I have a 2024 GMC 1500 SLE 5.3-liter V8. I have only owned the truck since August 2024, with under 10,000 miles on the truck.

Transmission Valve body failure, NO ETA for a replacement valve body, today is 2/25/2025 Nothing! So pissed with GM, I filed a case with GM that's not doing anything to help me, filed with the highway safety administration.

Adam Cummings - GM is not delaying the process. Parts are not available. The last valve body I ordered for a 10-speed took almost 2 months to come. They are shipping as fast as they can build them, and there is basically a waiting list.

Dale Helmick - My 2019 Sierra 106,000 miles is headed back in for the 5th time. It's my 4th torque converter, and now something else is vibrating, and on top of that, a cylinder gasket is leaking oil. If you buy a used one, make sure you pick up the extended warranty!

Marty Sica - I keep telling you guys there is a recall on both transmissions! I got my letter months ago and brought it to the dealer. They updated and reprogrammed it, covering it for 6 years and 150k. I have a 2021 3500 Silverado High Country Duramax! Check into it.

General Motors Issues a Recall

In November 2024, the NHTSA and GM issued a recall for the 2020-2022 Chevrolet Silverado and GMC Sierra trucks; however, the recall only involved vehicles equipped with diesel engines, not the 5.3-liter V8.

GM faces a class action lawsuit over defective transmissions.

The problem is so bad that General Motors faces a class action lawsuit alleging the company knowingly sold several hundred thousand vehicles with defective transmissions.

The lawsuit covers approximately 800,000 vehicles manufactured from 2015 through 2019, 514,000 of which are in the certified classes.

Did GM fix the transmission problems in 2020 and the newer Silverado and Sierra trucks?

Reports say that newer models like the 2020 and 2021 Sierra and Silverado with the 10L80 transmission have also been subject to similar issues, indicating that the problems persist despite GM's attempts to address them.

According to discussions on Reddit, there are reports of transmission issues with the 2024 Chevrolet Silverado and Sierra, with users mentioning problems like torque converter failures, "blown valve bodies," and concerns about the transmission running too hot, leading to potential premature wear and tear, particularly when towing heavy loads. Some users even claim these issues are frequent enough to warrant other potential class action lawsuits against GM.

GM knows there is a problem, but they don't have the parts to fix the transmissions.

On the GMC Sierra Facebook owner page, AC says that GM made his payments, and the dealer gave him a brand new Traverse High Country to drive for 8 months. "It literally was a truck for sale on the lot and had plastic still on seats," he said.

GMC told him, "We are experiencing a delay on parts needed to repair your 2021 Chevrolet Silverado. We understand this is a significant inconvenience, and we will continue to work diligently to resolve the delay."

Final Thoughts and Questions For Silverado and Sierra Truck Owners

General Motors has not fixed the problem with the 2024 GMC Sierra and Chevrolet Silverado truck transmissions.

To make the problem worse, GM doesn't have the parts to fix the transmissions, so customers like Matheus will have to wait months for their new trucks to be fixed.

It's Your Turn

Have you experienced transmission problems with your GMC Sierra, Chevrolet Silverado, pickup, or other GM model? Please let us know by clicking the red Add New Comment link below. Your experiences can help others in the GM truck community.

Check out my GMC Sierra story: My GMC Sierra Pickup Has 20,000 Miles, and It Won’t Start, My New Battery Is Dead and the Dealer Says They Can’t Fix It

I am Denis Flierl, a Senior Torque News Reporter since 2012. My 30+ year tenure in the automotive industry, initially in a consulting role with every major car brand and later as a freelance journalist test-driving new vehicles, has equipped me with a wealth of knowledge. I specialize in reporting the latest automotive news and providing expert analysis on Subaru, which you'll find here, ensuring that you, as a reader, are always well-informed and up-to-date. Follow me on my X SubaruReport, All Subaru, WRXSTI, @DenisFlierl, Facebook, and Instagram.

Photo credit: Denis Flierl

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