thanks,just popped hood after letting her cool down and upper rad hose was sucked in,bottom hose wasn't hard though,changed exp cap and thought that might have been issue,when squeezing upper hose i see exp tank coolant moving with pressure so it's not clogged,coolant was a little above split line so i sucked some out back down to line.have a feeling it may be sooner than later!! on gaskets,we'll see soon enough,cap i bought is identical to old one but maybe it had something to do with flat upper hose.btw,when starting truck hose pressure comes right back.update,so far truck is not leaking any coolant and running great,letting [k-seal] cook a little longer then flushing everything and will change hoses and t-stat then cross my fingers that it lasts for a long time!!