Shine, Just a stab here but If this kit uses the GM metric calipers with the internal disc brake they take special setup, I fought this a bit until I found instructions, that where not with my kit, I found some on Master Powers web site at http://www.mpbrakes.com/docs/orig-gu...STRUCTIONS.pdf the thing is, as you know most of this stuff is rebracketed OEM parts, so they are tried and proven to some extent, and as you also know customer service in this country left awhile back, so finding out whats wrong anymore is pretty much left to the consumer. Best of luck Matt