if it is a 97-03 model.....
you will need to gently pull out on the center piece that wraps around the radio...and you will see it will just pop right out. move your steering wheel as low as possible as stated above... and you can just pull it out of the way. be sure to disconnect the plugs going to the HUD(if you have it), fog lamp switch, head lamp switch..etc. and set aside.
now. the DIC will just pull straight out. it has the same clips as the dash cover you just pulled out. then just simply remove the connetor and replace the unit.