2016 silverado v8 revs but won’t accelerate

I purchased a 2016 Silverado with 115k on it. Before purchasing, I did read that the 16-18 have a few transmission problems, but I had a transmission service done by the dealer and had it driven 5 hours down to me with no issues. I was driving for about an hour and everything was normal, but when I hit stop-and-go traffic, the truck would rev but barely accelerate. I parked it for a few minutes and then started driving again, and it seemed to be pretty normal.

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Unfortunately, the transmission will most likely go. Can you hear the pump win? RPMs are increasing, and the truck is shifting slowly.

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I could certainly hear a whining noise, and the rpms were going higher. I’ve had the truck for just four days now, and it’s a three-day weekend, so I’m returning it to the dealership on Tuesday and will probably just take it from there.

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Check the fluid level first. It’s possible that the dealer didn’t refill it properly, resulting in a lack of fluid. Otherwise, it’s likely a failing transmission. If you have a warranty, contact the dealer to get it returned. If you don’t, call and discuss the issue with them. Many dealers will pay for parts or labor to resolve the issue.