You can easily fill that time experiencing some of Southern Utah's amazing National parks. Zion, Bryce canyon, Capital Reef, Arches and Canyonlands are all amazing !!

If Reno is not a priority you could head from Sequoia to SF and then Yosemite and drive across the Sierra's on the amazing Tioga Pass. You could then consider driving across Death valley into Vegas and then to the Utah parks ( in the same order as above ) followed by a trip through Monument valley to the Grand canyon south rim, Sedona and finally back to LA.