How do you replace an AC evaporator on a 2001 Dodge truck?
I replaced mine in about 6 hours and took some photos of what is behind the dash. Take your time on the dash removal and be sure not to break anything, so as not to make added work for yourself. The dash removal was not that bad in my opinion. Pull the heater lines and A/C lines, you will need the quick disconnect tools from an auto parts store to get the lines apart without damaging them. There are nuts under the hood on the firewall that need to be loosened or removed, I found it easier to remove the nuts and pull the heater and A/C assembly. Be sure to replace the receiver/dryer too and don't allow any dirt to get in the A/C lines. If you need to cut any lines use a tubing cutter. Don't cut any lines that you don't have replacements for. Once you get it back together you will need to evacuate the air and moisture from the system with a vacuum pump. If you don't have a vacuum pump now may be the time to take your vehicle to a shop that has one, I can't imagine they will charge you much to pull a vacuum. Then charge the system with the correct amount of freon.
I am not sure about the 2001 trucks but on my 1998 Dakota the entire dashboard had to be removed......Dealer costs. - a whopping $1100.