[tsc]

I hadn't realized the lug nuts were 22mm until I went to test the clearance of my deep socket, which was 21mm as that is what my 2010 used. Had to get a new deep socket and a new lug wrench that had 22mm on it. When it's not so damn cold out I'll do a test fit and put my wheel locks on.

 

[tsc]

DrBuick manual says the lugs are 22mm. 7/8 is close and would work, but is slightly larger.. I'd be too worried about stripping something on the lugs. From the owners manual:

Lug Nut/Bolt Torque **Lug Nut/ Bolt Size
Lug Nut/ Bolt Socket Size 111 Ft-Lbs (150 N·m) M14 x 1.50 22 mm