Mine was out a few weeks ago, right when an inspection was due, so it had to be fixed. I asked the dealer how much they charged to do it, and they said "nothing...we don't charge our customers for changing the bulb. We only charge the price of the bulb, which is about $2."
I asked him if he knew what he was getting himself into on the Borrego, and he said "yep...doesn't matter. We do it anyway".
Sure enough, they did it, and the bulb was like $1.75, so I was VERY happy with my dealer at that point. And I don't really take it to them for everything...just things that are a pain in the butt to do.
He said that they dropped the inner fender liner and went in that way. One of the guys has long skinner arms and was able to reach it easily.