Dash Removal
This is a two step procedure. One is to remove the front dash plate, which gives you access to the heater control plate and the antenna cable, as well as the radio. This is actually fairly easy, once you get the required things un-done. The second is the actual dash pad (the padded part), which you only remove if it is EXTREMELY necessary. But this is required to access the heater box, heater core and fan.
First, go the OANA site shown above for the tips. The key issues for the dash plate are to:
1) Drop the steering wheel
2) Remove the flasher AND the two hex-head screws, from the sides, near the bottom of the lower panel
3) Disconnect the speedo cable
4) Disconnect the wiring harness plugs from the fuse box
The dash pad is MUCH more difficult. You have to remove the screws along the sides of the dash pad (next to the doors), but the tough ones are the screws along the TOP of the dash, right up to and just below the windshield. These are hard to get out, and almost IMPOSSIBLE to get back in, unless the front windshield is out. The trick is to have a long, thin flexible Phillips-headed screwdriver, and a LOT of patience. And you also have to manuever the defroster vent and fresh air vent hoses off, and then back on again.
Frankly, I wouldn't even attempt this without a factory manual to guide me.
HTH and good luck.