Delco

CALIPER

Remove or Disconnect
1. Two-thirds of the brake fluid from master cylinder.
2. Raise vehicle and support with safety stands.
3. Tire and wheel.
^ On models with composite rotor, reinstall two lug nuts to retain rotor.

Compressing Piston Prior To Caliper Removal:

4. Compress piston using adjustable pliers over inboard lining (7) tab and caliper housing flange (12).





5. Brake hose from caliper by removing inlet fitting bolt (14).
6. Mounting bolts (2).
7. Bolt boots (1).

Suspending The Caliper:

8. Caliper (12).

Delco Shoe And Lining Assembly (3400):

9. Mounting bolt seals (4), if used.
10. Bushings (3).

NOTE: Inspect the mounting bolt and sleeve assemblies for corrosion. Replace if any is found. Do not attempt to polish away corrosion. Inspect bolt boots for nicks, cuts, or corrosion. Replace if any are found.

NOTE: Clean the caliper assembly and install a new brake hardware kit anytime it is removed from rotor.

Install or Connect

CAUTION: Always use the correct fastener in the proper location. When you replace a fastener, use ONLY the exact part number for that application. General Motors will call out those fasteners that require a replacement after removal. General Motors will also call out the fasteners that require thread lockers or thread sealant. Unless otherwise specified, do not use supplemental coatings (paints, greases, or other corrosion inhibitors) on threaded fasteners or fastener joint interfaces. Generally, such coatings adversely affect the fastener torque and joint clamping force, and may damage the fastener. When you install fasteners, use the correct tightening sequence and specifications. Following these instructions can help you avoid damage to parts and systems.

NOTE: Any new rotor must have the protective coating removed from the friction surfaces before being placed in service. Use Goodwrench Brake Parts Cleaner (GM PIN 12345754), or equivalent, and wipe the surface clean with clean cloths. Do not use gasoline, kerosene or other oil-based solvents which may leave an oily residue. This residue is damaging to brake linings and flammable.

Delco Shoe And Lining Assembly (3400):

1. New bushings (3) and bolt seals (4).

Mounting Bolt Lubrication (Delco 3400):

2. Lubricate bushings (3) and mounting bolt seals (4) with GM P/N 18010909 or equivalent.
3. New bolt boots (1).
4. Caliper (12).
^ Fill both housing cavities between bushings (3) with GM P/N 18010909, or equivalent.
5. Mounting bolt and sleeve assemblies (2).
^ Tighten bolt (2) to 51 Nm (38 lb. ft.). The bolt boots (1) must remain secure after tightening bolts.
6. Brake hose to caliper.
^ Tighten brake hose bolt to 45 Nm (33 lb. ft.).

Caliper To Bracket Clearance:

7. Measure clearance between caliper (12) and bracket stops (16). If necessary, remove caliper and file the ends of bracket (16) to obtain 0.26 to 0.60 mm (0.010 to 0.024 inch) total clearance. Measure the clearances individually and add them together.
8. Tire and wheel.

NOTE: Before moving the vehicle, pump the brake pedal several times to make sure it is firm. Do not move the vehicle until a firm pedal is obtained. Check the fluid level in the master cylinder after pumping the brakes.