place in update>x64>dlcpacks

dlclist.xml
<Item>dlcpacks:\silverado\</Item>

extratitleupdatedata.meta
<Item type="SExtraTitleUpdateMount">
			<deviceName>dlcMPSilverado:/</deviceName>
			<path>update:/dlc_patch/MPSilverado/</path>
		</Item>