front right brake shoes dragging
 

hi i have a 2003 chevy s10 blazer 4x4 ls. problem is the right front and right rear brakes dragging. i replaced right rear and right front brake shoes rotors and calipers and brake line from caliper. i removed parking brake and removed what was left of the brake shield. i bleed the system on all 4 and replaced all brake shoes. left side rotors were good. no uneven wear. the right side front and rear worn to metal on inner brake pads. all signs pointed to bad calipers so i replaced. only issue left is the front right still dragging. please help. my buddies said maybe its a bad caliper i purchased from o riley auto parts. if that doesnt fix it they said it could be the abs module.