I doubt the height will be the same from the Toyota to the Chevy. There are a couple things you must consider, spring squat difference, actual bed height from the ground. You should be able to adjust your hitch height, or your pin box to set up your new truck, for your fiver. As far as the bed length, your hitch MFG's rails will dictate where it goes. Happy camping, good choice in truck as well.
2010 Jayco Eagle Super Lite 31.5 FBHS
08 Chevy 2500HD LTZ Duramax /CC/SB/4x4