I have chromed in-channel ones from Putco on my Denali. I think they're the same for Suburban / Tahoe, but don't quote me on that -- double check! I think this is
the one you need for the slightly shorter Tahoe / Yukon. Link to the ones I have is in my sig below. I like them alot because they're in-channel and don't mount to the door frame with the cheap sticky tape, and because they're in-channel, they have a lower "profile" than the other type, which I think looks better on my truck. Pics of my truck
over here. The only think I don't really like about the chrome variety is that they're obviously not transparent, and it increases the perceived width of the roof pillar you've got to look around while turning or changing lanes. No big deal, you just need to be aware of it. Installation takes like 10 minutes.