These all affect the Yosemite services.
Once again for the summer, there is a Thruway run that travels from Yosemite-Visitors Center (YOV), not the endpoint Yosemite Lodge (YOS) to Mammoth Lake (MMK). YOV-MMK is 8667, and MMK-YOV is 8662. The connection at YOV is made with one of the year-round Thruway trips between Merced and Yosemite Park.
Also, I also found another series of Thruway motorcoach trips that run along California Highway 41 between Fresno Amtrak station (FNO) and Yosemite Lodge (YOS). FNO-YOS runs are 8471, 8491, and 8493. A short-turn weekday-only trip 8495 runs on this route only as far as Oakhurst (OAH). YOS-FNO runs are 8494 and 8498. There is also a short weekday morning trip that originates in Oakhurst to Fresno, 8492.