I thought about this myself. However, starting in 03, GM (re)moved the Cigarette lighter and 12V plugs that are under the AC controls in the 01 - 02's, moved the AC controls down and increased the radio opening from a din and a half to a double din. Seems to me you've got three options:
Option 1 - Swap out your current IP for a later one to get the double din opening
Option 2 - Go to the trouble to move the AC controls down and increase the radio opening on your current IP
Option 3 - Exchange the double din for a single din and get a kit for it to work in the din and a half opening.
If it were me, I would just go with option 3.