2018 centennial edition w/ 7500 miles, torque converter shudder at low throttle application.... new transmission??

[WeberKettleGuy]

6 minutes ago, newdude said:

 

 

The fluid TSB - 18-NA-355 1..17 (nhtsa.gov)

 

TSBs are not recalls or field updates.  Recalls and field updates will attach to a VIN in GM's system.  TSBs are just diagnostic aids.  

This is very helpful. Thank you very much!

[WeberKettleGuy]

Repair update!

Truck went back to the dealer Friday. Tech took it for a drive to ensure there were no more misfires, and finally agreed with me that the torque converter was shuddering. Trans fluid was exchanged via the TSB. My bill out the door was right around $300, which honestly isn't too bad for a case of trans fluid and not having to mess with it. Truck immediately drive better, with no noticeable shudder after only a few miles. There still seems to be a slight miss from time to time. I'll end up changing the rest of the spark plugs out soon, and the tech also recommended running some injector cleaner through it since it has sat so much. 

 

Appreciate all the recommendations and information from you all! It's nice to have the truck issue free.