Have you searched Shop GM Parts - GM Genuine Parts & ACDelco ? You can type in your VIN there and SHOULD only see parts that are applicable to your vehicle. (I searched springs for CT6-V and it only showed springs that fit the V cars, not the other CT6 trim levels.)

 

After checking the GM Parts site which will use your VIN for parts specific to your vehicle, another site that will offer pads from several sources and driving style recommendations is Rock Auto:

2019 CADILLAC XT5 3.6L V6 Brake Pad | Shop Now at RockAuto

Brake & Wheel Hub Parts and More for Your 2019 CADILLAC XT5 at Reliably Low Prices. Fast Online Catalog. DIY-Easy. Your Choice of Quality. Full Manufacturer Warranty.

www.rockauto.com

Check the prices offered as well as shipping costs. Rock Auto is a very good resource.

BTW: the XT5 is fitted with either 18" or 20" wheels. 17" were never offered.

 

CarID is a good place for parts also. If you click on any pads it will tell you that the pads 'fit all models'. Calipers are the same for either size rims.

 

I replaced the OEM pads with Brembo's. Better pedal feel but more dust, unfortunately.

 

Did you replace the rotors with Brembo ones too?
If you only replaced the pads then you have dissimilar metal properties and it will create more dust. Brembo pads and rotors are designed to specifically match with each other and if you mix them (either another brand or even different "grades" within Brembo) you will get worse performance/wear/dust.
Every Caddie I have owned with Brembos had not had any problems with dust. They all did squeak like crazy, though, until you get them heated up.

 

I think that's a thing with Brembo. My CT6 came with OEM pads by Brembo and many owners have gone away from them to Porterfield Racing. HUGE improvement in dust accumulation on the wheels.

 

I don't understand some peoples Obsession about Brake Dust, I would rather have a Vehicle that Stops, than spotless Wheels, which can be hit with a Pressure washer a few times a year