My 2021 Silverado RST with a 5.3 and 8 Speed developed the dreaded "Silverado Shudder" at about 64,000 miles. I took it in, and it needs a new Torque Converter. The new Torque Converter replacement does not include any labor/parts for changing the filter and flushing the fluid. $2200 labor, $900 parts, and $50 misc for $3150. I have to say that is twice what I thought it would be. This is the one time I actually bought an extended warranty thats only good for about another 5K miles. It covered all but a $100 deductible and $683 for the fluid flush and filter. I'm grateful I had the warranty, but I didn't expect a fluid flush and filter change to be almost $700.