Cutlass V6-191 3.1L VIN M SFI (1998)
Brake Shoe: Specifications
Replace bonded brake shoe and lining assemblies when the thickness of any lining is worn within 0.76 mm (0.030 in) of the shoe.
Replace riveted shoe and lining assemblies when the thickness of any lining is worn within 0.76 mm (0.030 in) of any rivet head.