haha! well first call around and ask some A/C shops if the nitrogen fill systems for leaks. thats the only way i was sure it was the evaporator, first! you must remove the pass seat to make this as less painfull on yourself as you can!!!!!!!
remove glove box,
remove heater core cover,
remove the clamps for heater core both under dash and the one outside by the hoses,
remove heater core,
remove blend door and the actuating cable,
and bam you got yourself an evaporator! it sits in front of you, cut the evap case lip with a razor blade cleanly! its only the bottom lip cut about 4-5" long off, keep this piece so that you can epoxy/jb weld/rtv it back in place when reinstalling.
remove ac lines/expansion valve and the evap will slide out!
the evap will take aprox 3-4 oz of 150 weight refrigerant oil before reinstalling the new evap i called the dealer and they couldnt tell weight or amount after finally finding a dealer who used alldata i was able to get the correct weight and amount. only took me an hour to get it out and about an 2 hours back in because of cure time of the epoxy.
reinstall all of ^^^^^^^^^^^^^^^^^^^^^^^^^^^ in reverse order.
vac down should only take about a min or less to get 28" hold vac. for 15 min or so charge with 2 pounds/32 oz of 134 and enjoy!