Silverado Transmission Fluid and Filter Change

2014 Chevrolet Silverado 2wd with a 6L80 transmission. I am doing a filter and fluid change on this truck because the fluid was pretty black when I checked it. The truck does have a torque converter shudder at around 30 and 50 mph as well. There is a TSB on this problem but this truck has over 160k miles and it may be to late especially due to the amount of metal and how dark the fluid was. Parts: Ac Delco filter kit: https://amzn.to/3H9uY1Z Ac Delco Dexron VI: https://amzn.to/3KOGFh2