Lawsuit Investigation into Chevy, GMC 10-Speed Transmission Problems

Attorneys working with ClassAction.org want to hear from people who had problems with the 10-speed transmission in their GM vehicles.

Drivers of recent GM models including (but not limited to) Chevy Tahoes, Chevy Silverados and GMC Sierras have complained about problems with their trucks’ transmissions—including harsh shifting, loss of power, shuddering, hesitation and trouble shifting into gear—and attorneys are looking into whether a defect is to blame. If so, they may be able to file a class action lawsuit on behalf of people who own or lease cars equipped with GM’s 10-speed transmission.

Which Vehicles Are Under Investigation?

Transmission Problems Reported Online

GM drivers have turned to online forums to voice complaints about the 10-speed transmission in their vehicles. Below is a sampling of some of their online complaints [sic throughout]:

I have a 2019 GMC Sierra 6.2L Denali, 10 speed transmission, with 36K miles on the truck.  I have recently noticed when the truck decelerates more than 20 mph, and then if I accelerate, I hear a single bang sound coming from the transmission as soon as I start to accelerate.  It is like the transmission is not prepared to go into the lower gear and jams itself into gear to accelerate.  There is no delay in the acceleration that I can tell, but it is a noticeable bank or thud sound of metal on metal.  Once it is in gear, it accelerates as normal, and there are no other sounds.  This will only happen after the truck has warmed up 10+ min and does not happen if I decelerate less than 18-20 mph. It does not happen as often if I use the brakes to slow down. Also if I come to a complete stop it does not happen and will only happen if the truck is already in motion above 10mph or so…”
— Ross C., GM-Trucks.com

I've had several German made diesel vehicles. They were all spectacular. I decided to purchase a Chevrolet with the 6 Cyl and couldn't be more disappointed. I purchased it in Nov 2019 and its been in the shop about 4 times for multiple issues primarily, check engine light, severe clunking (feels like you ran over a telephone pole at 70 MPH) Leaking oil etc.”
— JP, Edmunds.com

First I would like to start by saying that i wish I had gone with a different truck brand. Way too many issues to list but the most important and noticeable are with the transmission. The way it shifts, the way it feels I mean just everything is off about this piece of junk. Not a fun truck to drive at ALL! When coming to a stop it feels like you’re getting rear ended and it’s just plain annoying. It sucks big time because this are the issues I was trying to avoid by going with this brand and take the bullet and pay the extra money for what supposed to be a quality brand truck. Boy I was I wrong…”
— Mr F, Edmunds.com

Going on my 5th visit. Transmission slips bad, especially at lower speeds. Lurches than slams into gear. Stay away from gm[.]”
— Gregory C., Edmunds.com

Bought a 2021 AT4 with 3.0L Duramax. Ordered it and waited 4 months for it to arrive. Love the ride & engine. Had to be towed to dealer with 1,236 miles due to a "transmission module issue." Been 3 days haven't heard back. Think transmission might've blown. Wouldn't go in reverse, would go into reverse position but wouldn't move. Engine power was reduced & check engine light came on. The 10 speed transmission was supposed to be solid.... be cautious”
— Let Down, Edmunds.com

I bought a 2021 GMC Sierra 1500 AT4 6.2L V8 brand new end of July 2021. At around 18k miles the truck started skipping/jumping kinda like an old manual transmission jeep when you're first learning to drive it. I took it to local dealer 3 different times between 18k-29k miles with NO help. They kept saying, "it has plenty of warranty left. Just drive it until it gets worse." I traded it in today. I had the 6.2L NOT the 5.3L. It wasn't an option on here when submitting review.”
— Alex, Edmunds.com

How Can a Class Action Lawsuit Help?

A class action lawsuit may be able to help drivers get back some of the money they spent on repairs and compensate them for loss of vehicle value. It could also force GM to recall the vehicles and fix the transmissions at issue.

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