smoke in the cockpit

[Chuck-H2]

I Have a 2005 H-2 lux, today after driving in the 110% heat after 15 miles I stoped at taco bell and after 4 mins of waiting inside I left, I drove 100 yards and as I sat at a stop light the cabin filled with smoke. all coming frome the dash around the winshild and the sunroof was filled and the pillers between the door was seeping smoke. ( nothing from the vents), called the dealler and they thought it might be the A/C condensor?, but after having it towed they started to smell smoke also?. history, 2005 lux, factory dvd,in head rests, backup cam, and mobilegaurdian, (called mobilgaurdian and they said and gave me the correct position of my truch,also said if the smoke came from them it wouldent work )
smoke was so bad I couldnt see through the winshield,
dealear has now explentaion?, untill they take the dash apart.
options install before purchase? dealer install dvd in headrests, mobile-gaurdian, rear view backup montior, fully optioned, and only 4530 mile on the odometer.
just why would this start to have such smoke in the cabin?
whti a low mile only 6 mo old truck????