The tahoe is also about to take that big boat up a long canyon road, and then back down into a valley.
Hence the urgency!
Silly me decided i better swap out that Coolant recovery tank before the trip, and of course it introduced issues...
I hate it so much haha as I just order a 2nd vaper canister off ebay and just have to cross by fingers and hope it's legitimate not a fake or bad like the first one. cause of seems to be the last oem one listed on the net
ls's are usually eazy to bleed. usually just let it idle till the stat opens with the cap off, then turn it off, let it cool. top off tank and good.
is the front of the engine higher than that back? like you don't have a down hill driveway or something? or wasn't there something about an aftermarket radiator needing a restrictor in one of the small lines?