Stock Rim Offset

[JeremyW426]

I'm sure this has likely been covered somewhere on here but for the life of me I can not seem to find the stock offset for GM wheels. I have a 2015 with factory black 20" wheels and I'm trying to figure out the offset so I can determine what tires will fit without trimming. I know that a rim with a 0 offset will fit a 305/55R20 with no rubbing so this is why I'm trying to determine what I've got. Any help would be great, thanks guys!

[b1gted]

27MM for factory 20" and 24MM for 18" factory.

 

http://www.gm-trucks.com/forums/topic/171119-oem-gmc-wheel-backspacing-and-offset/

[JeremyW426]

27MM for factory 20" and 24MM for 18" factory.

 

http://www.gm-trucks.com/forums/topic/171119-oem-gmc-wheel-backspacing-and-offset/

Great, thank you!