I am wanting to upgrade my mirrors to telescoping for towing. I can't seem to find any...what gives? I've had many Suburban's and never any had trouble finding them before.

 

Make/model/year?

1aauto has just about every type you can imagine. Here are my 2 trucks, both upgraded with 1aauto towing mirrors.

 

I actually checked there before posting this.
Those (the ones like your picture) won't fit a 2017 Suburban...trust me, I found that out the hard way after disassembling my door. And now I have to pay to ship them back.
I think what's going on is that the new body style sub/tahoe doors are different than the pickups. They used to be the same, but my new one has a smaller, 3 bolt pattern on the mirrors.

 

Well, you could've started by saying you had a 2017 Burb. :-/

Since the Suburbans are the same platform as the fullsize pickups, I'd expect that they have the same bolt pattern and wiring. Look for towing mirrors for the K2XX Silverado/Sierra trucks.

If it was me, I'd probably start at the dealership parts counter. Ask the guy if the Silverado towing mirrors would fit on the Burbs.

 

thanks for posting that site a1auto.

parts and delivery are cheap in the states. 3x the price in canada.