If the buildup isn't too bad, you might get by with a bottle of fuel system cleaner in the fuel tank, but that didn't work for me.
There might be a write-up about throttle body cleaning in the techinfo section. Other people may have found a way to clean the throttle body without removing it, by removing the MAF screen and cleaning the inside, but I took it off, removed the MAF sensor and screen, and cleaned it with an old toothbrush and spray carb cleaner.
Note: You can remove the MAF sensor and IAC sensor and reinstall them without worrying about mounting adjustments, but don't remove the TPS sensor unless you plan on and know how to recalibrate it when you reinstall it - the mounting screw holes on that part are adjustable to calibrate the TPS voltage within the normal limits.
On your SE it might be easier than it was on both of my supercharged models. Mine took about an hour each.
'99 Bonneville SLE, white, 112,000 miles
'02 Park Avenue Ultra, white diamond pearl, 88,000 miles