this is currently the easiest method, when I did mine I just pulled all the thermostat parts out and tapped it and put a bolt in it and then put the cap back on.I would love to do this (new Tahoe owner here!!) but would like to watch a video or read a detailed thread if possible.
Anything out there like this?
whatever way you choose just be sure that snap ring is in properly or it could come off going down the road.
easy to do, when you take it off you might loose a few ounces of fluid so just have a rag handy, if the lines are dripping you can put a little piece of plastic bag and rubber band around them to keep it from leaking while you do the thermostat part