[tommr]

so you have air brakes. parts geek.com #59-8146. you may want to contact them and make sure that the item pictured is the actual item. they are showing it as a Suburban unit but the Sub never had air brakes. A1 cardone stuff is pretty poor stuff but it will get you on the road. they are showing $10.00 core but I wouldn't part with the core. watch ebay. I bought a couple new ones on there when they pop up. Summit used to have them but it looks like they no longer have. good luck.