Converter issue resolved?

[BryBoy]

I was planning to purchase a 2019 Colorado over the Labor Day weekend, but the converter/repair issues have me reconsidering.  Does anyone know if GM has started to put replacement converters in newer models?  Thanks for any insight.

[Hogndogz]

I recently purchased a 2018 Canyon with 5,900 miles on it. The hard shifting & shuddering in the transmission started almost immediately. When I took it back to the dealer I referenced TSB 18-NA-355. The service included flushing the tranny 3X with a new Mobil 1 fluid & reprogramming the transmission. After about 1K miles, it's still doing fine. The tech told me that the torque converter replacement did nothing to correct the problem.  The dealers are supposed to be performing this service on all models with the 8 speed auto transmission in their inventory. I would ask any dealership to provide records showing that TSB 18-NA-355 had been performed.

[Canyon Conundrum]

Don't do it

I had a 2019 GMC Canyon 8 speed with 5k on it as a loaner as they tried to fix my shudder.

It was the worst 8 speed I ever drove   way worse than mine.

Shudder on highway after warming up,  terrible 

 

[Rick D.]

I have a 2017 Canyon w/V6 - 8 spd.. The converter was replaced at 11k miles with the new fluid. Just recently, at 16k miles, they changed to another new fluid with no luck. Then they changed the valve body in the trans and it still shutters. I had a 2015 Canyon w/V6 - 6 spd that had the same problems. I was so frustrated that I got rid of it and went for the 2017 8 spd and my frustrations are still there. Why hasn't GM come up with a permanent fix (buy back)?

 

Edited October 9, 2019 by Rick D.