I have a 2017 Silverado LTZ, 6.2 Engine, 8 Speed, 4 door, 4WD and since I got it have had shudder, slams into gear, etc. We are snowbirds from Canada, travel 2100 miles to Florida and back and both Chevy dealers here and in Sebring Florida fluff you off saying its natural, no trouble found or cannot replicate the trouble..
Had a far better truck before had a diesel and a real transmission ie the Allison Tranny without doubt the best tranny in use in any vehicle.
Its a game they play and they are good at it both the dealers and the manufacturers.
Anyway I really wish you good luck, I gave up…..until its trading time…..there will be a different manufacturer’s vehicle in my driveway….this vehicles full price was $65,000 cad, I didnt pay that but paid way too much for this vehicle…..and its faulty Tranny.