GM tire size programs?

[81mmcat]

Does any one know if  the tire size com. program is the same for 275/70/18 and 275/65/20 or if GM has one for the exact tire size?

Edited April 10, 2021 by 81mmcat

[stevejones]

What?

[Earl Cordova]

1 hour ago, stevejones said:

What?

Agreed !

[81mmcat]

Try this,  on the 2020/2021 GMC/Silverado 2500HD's what tire size's can the dealer program the vehicle for?  

[redwngr]

Factory offers these: (outside diameters are likely similar)

 

QHQ    Tires, LT245/75R17E all-season, blackwall   

QXT         Tires, LT265/70R17E all-terrain, blackwall
QF6         Tires, LT275/70R18E all-terrain, blackwall
QG3         NEW!  Tires, LT275/70R18, mud-terrain, blackwall; Note: This tire has a reduction in conventional trailering capacity. See dealer for details
QF9         Tires, LT275/65R20 all-terrain, blackwall

Edited April 11, 2021 by redwngr

[81mmcat]

thank you!