Greetings,
Same Passlock problems as everyone else... blah, blah, blah... sad but that's GM. Here are few hints from the resolution on my 2001 Olds Alero. I didn't have to take the radio or heater controls out... all I had to do was take out the two 7MM bolts that hold in the frame/bezel around the instrument (Speedometer, Tack, Etc). Once the bolts are out put the Tilt wheel in the lowest setting and pull the frame straight towards you. Now unplug the Trip Reset button and you have all the room in the world to work on the magical yellow wire because it's sitting right there in front of you with enough slack.
While I had the instrument cluster bezel out I ran the toggle switch wires over to the fuse box by the drivers door and installed the switch there. In a Grand Am we had the switch was right under the dash and occasionally got hit accidentally... nothing but trouble. With the switch in the fuse box there's no way to accidentally hit it.
Using this method will take you minutes to complete and with no risk of damage to the radio, radio bezel or console plus you'll be comfortable in the driver's seat rather than like a contortionist in the radio opening.