White Smoke...after new injectors? on 2003 Chevrolet Silverado 2500 HD

I just purchased the truck. The gentlemen informed me he had just replaced the injectors last year, all 8 of them. Then while driving it the other day i noticed a little white smoke when I took off. I asked around, one of my buddies said i could have something in my air intake causing a little white smoke? is that possible or are the injectors going out again?
I figured I would add some better fuel treatment? and get a oil change plus buy a new air filter..

Asked by for the 2003 Chevrolet Silverado 2500 HD
"Bad" fuel injector and excess fuel causes black smoke, gray blue smoke on acceleration or after prolonged idle is oil related ( engine mechanical issues). White smoke could be steam, if you are loosing coolant could be as sign of a blown head gasket.