It's called sales, a common practice in the automotive repair business, sell, sell, sell. My '98 1/2 ton started leaking around 60K also, a common problem with that era Vortec motor. If it's not leaking I wouldn't worry till it does, I went almost a year before I had to give in. And if that is not bad enough, get ready to bend over somemore, cause when you fix the intake gasket he'll probably tell you the radiator needs to be rebuilt too! Brightside, it's cheaper than a new truck, unless you need a new truck?