Posted awhile back about UPS trying white trucks, our center has 4-6 I think. Along with this they are also testing some newer things in classic brown colored trucks.
Heated seats, vented seats (slit is in the headrest) not much airflow from what I can tell. Two fans in the cab, along with one or two (couple package cars have one, others have 2) larger fans in the back pointing upwards, along with vented bulkhead door (even has a filter). Also the lights in the back are MUCH brighter and motion activated, so you basically leave them on the whole time.
Any questions, I can try to answer, buddy of mine is driving one of these.
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