Hummer H3. Manual — part 1046

Courtesy of GENERAL MOTORS CORP.

Rear Brake Caliper Overhaul

Callout

Component Name

Fastener Tightening Specifications: Refer to Fastener Tightening Specifications.

Preliminary Procedure

1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .

2. Remove the rear disc brake caliper. Refer to Rear Brake Caliper Replacement.

CAUTION:

Refer to Bleed Procedure Caution .

CAUTION:

Refer to Brake Dust Caution .

CAUTION:

Refer to Brake Fluid Irritant Caution .

NOTE:

Refer to Brake Fluid Effects on Paint and Electrical Components Notice .

NOTE:

Refer to Fastener Notice .

1

Cap, Rear Brake Bleeder Valve

2

Screw, Rear Brake Bleeder Valve

Tighten: 10 N.m (86 lb in)

3

Boot, Rear Disc Brake Caliper Piston

4

Piston, Rear Disc Brake Caliper
Tip:

Do not use abrasives to clean the brake caliper piston or the disc brake
caliper bore.

Place a block of wood against the inside of the caliper body, opposite
of the caliper piston, then direct low pressure compressed air through
the caliper inlet port to remove the caliper piston.

During installation apply a thin coat of Delco® Supreme 11 GM P/N

2007 Hummer H3

2007 BRAKES Disc Brakes - H3

FRONT DISC BRAKE HARDWARE REPLACEMENT

12377967 (Canadian P/N 992667) or equivalent DOT-3 brake fluid
from a clean, sealed brake fluid container onto the outer surface area of
the caliper piston.

5

Seal, Rear Disc Brake Caliper Piston
Tip:

1. Use a small wooden or plastic tool, carefully remove the rear disc brake

caliper piston seal from the groove in the caliper seal bore.

2. During installation lubricate the new piston seal with Delco® Supreme

11 GM P/N 12377967 (Canadian P/N 992667) or equivalent DOT-3
brake fluid from a clean, sealed brake fluid container.

Use a small wooden or plastic tool, carefully remove the rear disc brake
caliper piston seal from the groove in the caliper seal bore.

6

Caliper, Rear Disc Brake
Tip:

1. Inspect the caliper bore and housing for cracks, scoring, pitting,

excessive rust, and/or excessive corrosion. If any of these conditions are
present in the caliper bore or housing, replace the caliper assembly.

2. If light rust or light corrosion are present in the caliper bore, attempt to

remove the imperfection with a fine emery paper. If the imperfection
cannot be removed, replace the caliper assembly.

3. Clean the brake caliper piston bore and seal counterbore, the caliper

piston and the caliper sleeves with denatured alcohol or equivalent.

4. Bleed the brake system anytime the system is opened for repairs. Refer

to Hydraulic Brake System Bleeding (Manual) or Hydraulic Brake
System Bleeding (Pressure) .

2007 Hummer H3

2007 BRAKES Disc Brakes - H3

Fig. 21: Disc Brake Hardware Replacement - Front
Courtesy of GENERAL MOTORS CORP.

Front Disc Brake Hardware Replacement

Callout

Component Name

Fastener Tightening Specifications: Refer to Fastener Tightening Specifications.

Preliminary Procedure

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .

CAUTION:

Refer to Brake Dust Caution .

CAUTION:

Refer to Brake Fluid Irritant Caution .

2007 Hummer H3

2007 BRAKES Disc Brakes - H3

REAR DISC BRAKE HARDWARE REPLACEMENT

Fig. 22: Disc Brake Hardware Replacement - Rear
Courtesy of GENERAL MOTORS CORP.

Rear Disc Brake Hardware Replacement

2. Remove the tire and wheel. Refer to Tire and Wheel Removal and Installation .

1

Retainer, Front Disc Brake Pad (Qty: 2)

2

Pin, Front Disc Brake Pad (Qty: 2)

3

Clip, Front Disc Brake Caliper Damping

Callout

Component Name

CAUTION:

Refer to Brake Dust Caution .

NOTE:

Refer to Fastener Notice .

NOTE:

Refer to Brake Caliper Notice .

2007 Hummer H3

2007 BRAKES Disc Brakes - H3