Front

If a visual inspection does not adequately determine the condition of the front disc brake shoe lining, a physical check will be necessary. To check the amount of brake shoe lining wear, remove the wheel and tire assemblies, and the calipers.
Remove the front brake shoes. See Disc Brake Systems, Brake Pads, Removal and Installation.
Combined front brake shoe thickness should be measured at the thinnest part of the assembly
When a set of brake shoes are worn to a total thickness of approximately 9.0 mm (3/8 inch) they should be replaced.
Replace both brake shoes (inboard and outboard) on both front sides of the vehicle.
If the front disc brake shoes do not require replacement, reinstall, the brake shoes making sure each brake shoe is returned to the original position on the vehicle it was removed from. (See Brake Pad Installation).

CALIPER INSPECTION
Check caliper for piston seal leaks (brake fluid in and around boot area and inboard lining) and for any ruptures of the piston dust boot. If boot is damaged, or fluid leak is visible, disassemble caliper and install a new seal and boot, (and piston if scored). Refer to Disc Brake Systems, Brake Caliper, Disassembly and Assembly.
Check the caliper dust boot and caliper pin bushings to determine if they are in good condition. Replace if they are damaged, dry, or found to be brittle.