With the right aftermarket harness it's plug and play. Just make sure the deck you put in you are able to adjust the levels of your pre amp outputs. you'll need to in order to get it sounding right. Put a double DIN pioneer in my 99 with the adapter harness worked well but took a while to get the settings right on the radio.

99 Gen 2.5, fixing blown head gasket
89 SWB- 33's, ARB Front locker, SR rear locker/axle, SR F brakes, winch, WST Offroad Armor all Around, 2.85 Aussie T-case Gears (SOLD)
Sold: (2) 95 SR's, 86 SWB, 90LWB, 91 LWB
-Can Change a timing belt in my sleep..