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96 suburban a/c

my 96 suburban has a rear a/c in it and im changeing out the orifice tube in front but i cant find the rear one. is there a rear orifice tube… can anyone tel me were its located.

The rear unit is controlled by an expansion valve that is mounted directly too the bottom of the evaporator. Most of the fittings that will have to be loosened to complete this job are prone to being siezed.