Last one to post in this thread wins!

Got a question for you gear heads. Noticed my 09 GMC pick up with a 5.3 and under 100,000 miles, started to puff out white smoke at start up.
Today I checked the oil level and was changed less than 2,000 miles ago was about 1 quart low. also checked the water level and looks good not getting water in the engine from what I can tell.
PCV valve clogged????