03 z71 rear caliper question

[Kaotik]

ok quick question hoping someone can help my 03 hoe z71 needs rear brakes so i want to pick them up before i get home tomorow but i called my autozone and they asked me if i have single or dual piston calipers is there any way i can tell without having to take the wheel off

 

[Splatmaster527]

most likely duals
my yukon is dual and im pretty sure most are

 

[BananaHANDS]

Definitely dual I just did mine a couple weeks ago. Had to buy a new caliper for the driver side rear. 50 bucks with a 50 dollar core charge.