Oil leaked out onto manifold, then it died. Why did it leak?it on 1999 GMC Yukon

It was a very cold morning, I warmed up my truck. About 1-1/2 miles from the house oil leaked out onto manifold on the drivers side, smoking like crazy. By the time I could pull over, it just died. While sitting there oil puddled under my truck. I checked the dip stick, completely dry of oil. I really need a mechanic!
Thanks for any help or advice, kymberly

Asked by for the 1999 GMC Yukon
poss oil cap gone or valve cover gaskets are bad