Dear friends, truck got stolen and the guy drove it like he stole it - got truck back - by the size of the hitch draw head was towing something heavy - anyway - had to do calipers because brakes were down to squeelers . During pad replacement I noticed the two calipers are of different "styles" and thus the caliper pin bushings that that came in the brake kit didnt fit one caliper - one takes the "rings" bushing and the other has a long black silicone sleeve with flanges on both ends of the sleeve. The caliper with the long sleeve seems to be from a K3500. Yet the brake pads fit. Any one have an idea what is going on here ? Also, the brakes wore perfectly symmetrically on both calipers - however the presumed K3500 caliper was worn to squeelers and the other side had a lot of pad left, which suggests more caliper clamping force - yet I never noticed any pulling ever. Any ideas what is going on ? Or what that caliper is ? To make it right - thoughts on caliper upgrade ? JB6 C5S work truck cheyenne.