What could be causing shudder at varying speeds following routine service?

What is your question?

2020 Chevy Silverado (26,000 miles). Truck is shuddering at highway speeds and most recently severely suddered when accelerating up a small hill at less than 30 mph. No previous issues. Issue started 1-2 weeks after routing service (oil change and tire rotation). Due to an oil leak, I discovered days after service that the oil filter was not even hand tight. I tightened filter and noticed the oil was overfilled significantly. I drained in excess of 1 quart to bring it down to the top fill line. Could there be any connection between this? I have a service appointment but would like input to avoid getting the run-around.

What makes this problem better or worse?

High speeds

How long has your 2020 Chevrolet Silverado 1500 had this problem?

2-3 weeks.