Hello Customer. Welcome to justanswer!
YOu need to take the whole dash off until you can see the whole top of the heater case. see the picture below:
In the file in the link below is all the info thats available on removing the dash.
CLICK HERE FOR PDF FILE DOWNLOAD
You need to remove the whole dash theres no short cut. The cross bar is what has to be out of the way to be more precise.