Guess it's time to chime in and explain the 140 HVAC system in detail. Not all 140 chassis had the rear AC, usually just some SEL versions. If you're thinking cold air will come out from the back of the console vent that faces the rear passengers, sorry that's not rear AC but just a vent. I had the same question on mine a few years ago and was told this. The rear AC is usually another evaporator in the trunk blowing forward. Read your owner's manual for a detailed description of the system or check your trunk area.