Congrats on your new ride—it’s such a cool car! There is no spare tire on a Cadillac SRX.
None of Cadillac’s contemporary models come standard with a spare tire. Instead, they feature a tire inflation kit with tire sealant and a small air compressor.
That being said, you can purchase a spare tire storage/carrying case as an accessory from Cadillac or as an aftermarket part online. Keep in mind, however, that spare tires should not be used for more than 70 miles or at speeds higher than 50 mph.