I've lived in Phoenix for over a decade, where it regularly reaches 120F during the summer. Not once have I ever seen a USPS vehicle other than the Grumman LLV

I've lived in Phoenix for over a decade, where it regularly reaches 120F during the summer. Not once have I ever seen a USPS vehicle other than the Grumman LLV, which has no AC, even during the summer months and at several different residences across the state.