Thus, to answer Matt's question below, no, a fire rated door is not required (of course, there may be a local code which requires a fire rated door, which would be a 20 minute rated door).
As Jerry mentioned, your local code will prevail, but the IRC
requires a solid wood door min. 13/8" thick, solid or honeycomb steel doors of the same thickness, or a 20 minute fire-rated door.
Also requires 1/2" gypsum on the garage side and 5/8" type X with habitable rooms above.
Note the IRC does not require a fire separation wall as Jerry is referring to, just "separation" but the intent is clear.
This is all in IRC 2003 section R309