weird white smoke???

[boat309]

ok so i have a 06 6.0 with just duel exhaust. and when the motor is not fully heated up it will smoke when i am stoped for a few seconds. but only when im stoped. and once the motor heats up its fine, no problems. i dont have a check engine light on and the truck runs great. i have 65000 miles on her. and also im not low on coolent or oil. any ideas???