Yeah, I wanted to say that I didn't think the Yukon CHMSL used regular (e.g., 194) bulbs but wasn't absolutely certain if such was the case for '01...although if I was a betting man I would have said that it didn't take 194 bulbs...
There should be a part number on that assembly; go to gmpartsdirect.com and plug that number in to see how much the discount price is on it...