I'm also searching for a set of mirrors for my 99 Yukon. I've had bad luck so far ordering from ebay (every time I buy a set of non-OEMs, the order gets cancelled because there's no stock availability). I've also read that non-GM mirrors do vibrate alot like you said. I guess at this point I'd be happy to find a set of power mirrors that don't vibrate, I'll forego all the other bells and whistles, for now.
Maybe someone can clue us in as to who makes mirrors that don't vibrate? Maybe Tyc or Dorman's products are ok? I'm tempted to buy a set from a brick-n-mortar outfit so I can take them back if they don't sit still like the original GMs.
---------- Post added at 10:05 PM ---------- Previous post was at 09:55 PM ----------
So I found one that we can exclude.. K-Source OE-Style Replacement Mirror
Part No. 62012G. The two reviews on AdvanceAutoParts.com say it shakes badly.
---------- Post added at 10:36 PM ---------- Previous post was at 10:05 PM ----------
It also seems that the Tyc and Dorman mirrors have bad reviews on Amazon for their shakiness. So does the ****, in fact all 3 reviews are negative on the shaking. Same thing with "Fit system". Looks like we're all out of "reputable" manufacturers.