I checked the wheel size site for you and found the saab 97-x center bore is 78.1mm and the traverse is 66.9mm. you may have some work to do to fit the wheel over the raised wheel centering bump in the middle of the axle flange. ideas? wheel bolts on the saab are 12mm and 14mm on the traverse which means you may wanna use the traverse studs so the lug nuts fit properly in the wheels. not trying to engineer your truck for you, just giving you a heads up, but you probably knew already.
those 18's with the et50 offset may be the ticket for clearance issue
https://www.wheel-size.com/size/saab/9-7x/2007/
https://www.wheel-size.com/size/chev...traverse/2019/