RepairPal Certified shops can diagnose and repair your 2004 Chevrolet Trailblazer. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
front rotor discard thickness is 27.5mm
rear rotor discard thickness is 18.5mm
All brake rotors have a discard dimension cast into them. Replace any rotor that does not meet this specification.