Contributing Writer, GM-Trucks.com
Back in December, GM-Trucks.com member Jammin87SS posted a note here about a class-action suit related to GM 8-speed automatic transmissions. This transmission was used widely by GM, including in the Sierra, Silverado, Colorado, and Canyon pickup trucks. Owners have been complaining of shuddering and hesitation. Owner of a Silverado, Ed T., wrote a typical description for CarComplaints. He says, "Ever since I bought this truck new there has always been a shifting problem. This problem occurs whenever I slow down to a fairly low speed and then accelerate. When I accelerate there is a hesitation for a second or 2. This is very annoying and could potentially be dangerous. I have contacted my dealer and he just says "that's the way they shift, no fix"??? Dealer also stated that the transmissions have a learning chip and shifts the way a person normally drives - that's total BS. I have had my truck for over 2 years and it still shifts poorly. Besides the above I love my truck very much, GM just has to fix this problem..."
GM knows there is a problem. It has issued both notices to its dealer's technicians and also TSBs. However, it has yet to find a solution that works.
There is a class action suit that you can learn more about here. Our questions for our members are; 1) Have you experienced any issues with your 8-speed, and 2) was the dealer able to fix it? Let us know in the comments below.
Looking for some help. I have a 2019 Crew Cab LT Trail Boss with 4,600 mi, 5.3 engine. Blew an oil cooler line a few weeks ago, drove 200ft with the blown line and shut the truck off. After telling the dealer and tow company not to start it the first thing I hear from the dealer is that the truck was stalling out as they drove it into the shop/moved it and that a nice feature on these new trucks is that the engines don't blow with low oil, they just stall out. Next day the dealer tells me that it's a blown engine. I've been telling the dealer for a week now that I want a new truck. What's a reasonable course of action for the dealer here? What should I expect as a solution or should I ask for as a solution? They're currently tearing apart the engine so GM can evaluate what exactly is wrong and do a cost analysis.
I replaced these wheels with aftermarket at the 2,000 mile mark. They are like new, as you can see in the pictures. I'm selling them all together (four Denali wheels, the spare, and five Goodyear Wranglers with full tread life). The Wranglers are 265/70R18. The 8x180 lug pattern is for the HDs, but they can be adapted to different lug patterns if you're trying to update an older model truck.
They're all beautiful with no curb scuffs or damage of any kind. I'm asking $1800 for all, but I'm somewhat flexible on that if you make a solid offer early. You can come pick them up, or I'm willing to ship them if you're willing to pay the shipping. PM me if interested or post publicly if you have any questions that could benefit the group.
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