Hummer H3. Manual — part 1042

Fig. 12: View Of Disc Brake Pads & Brake Caliper Mounting Bracket
Courtesy of GENERAL MOTORS CORP.

6. Grasp the brake caliper housing and try to move the brake caliper housing up/down and

forward/reverse in relation to the brake caliper mounting bracket. If excessive looseness is
observed, the brake caliper bracket bushings and/or the brake caliper mounting bolts may
need to be replaced.

7. Compress the rear brake caliper pistons.

Install a large C-clamp over the top of the caliper housing and against the back of the
outboard pad.

Slowly tighten the C-clamp until the pistons are pushed completely into the caliper
bores.

Remove the C-clamp from the caliper.

8. With the pistons compressed into the caliper bores, grasp the brake caliper housing and slide

it back and forth on the brake caliper mounting bolts. Check for smooth operation. If the
brake caliper housing slide force is high or the brake caliper housing does not slide
smoothly, inspect the brake caliper mounting bolts and/or the brake caliper mounting
bracket bushings for wear or damage. If wear or damage conditions are found, replacement
of the brake caliper mounting bolts and/or the brake caliper mounting bracket bushings is
necessary.

9. Remove the brake caliper mounting bolts from the brake caliper mounting bracket and

support the brake caliper using heavy mechanic's wire. Do not remove the hydraulic brake
hose from the caliper. Refer to Rear Brake Caliper Replacement.

10. Remove the disc brake pads from the brake caliper mounting bracket.

11. Inspect the disc brake pad mounting hardware for the following:

Missing mounting hardware

Excessive corrosion

Bent mounting tabs

Looseness at the brake caliper mounting bracket

Looseness at the disc brake pads

Excessive contaminants in the brake caliper mounting bracket surface and threads

12. If any of the conditions listed are found, the disc brake pad mounting hardware requires

replacement.

13. Ensure the disc brake pads are held firmly in place on the brake caliper mounting bracket,

yet slide easily on the mounting hardware without binding.

2007 Hummer H3

2007 BRAKES Disc Brakes - H3

Fig. 13: View Of Caliper, Pin, Boots & Caliper Mounting Bracket
Courtesy of GENERAL MOTORS CORP.

14. Inspect the caliper bolts (1) for the following:

Binding

Seizing

Looseness in the brake caliper mounting bracket (3)

Bent or damaged brake caliper mounting bolts

Cracked or torn boots (4)

Missing boots

Bent or damaged brake caliper mounting bracket (3)

2007 Hummer H3

2007 BRAKES Disc Brakes - H3

15. If any of the conditions listed are found then the brake caliper mounting hardware requires

replacement.

16. Install the disc brake pads to the brake caliper mounting bracket.

17. Install the disc brake caliper to the brake caliper mounting bracket. Refer to Rear Brake

Caliper Replacement.

REPAIR INSTRUCTIONS

FRONT DISC BRAKE PADS REPLACEMENT

Fig. 14: Brake Pads Replacement - Front
Courtesy of GENERAL MOTORS CORP.

Front Disc Brake Pads Replacement

Callout

Component Name

CAUTION:

Refer to Brake Dust Caution .

2007 Hummer H3

2007 BRAKES Disc Brakes - H3

REAR DISC BRAKE PADS REPLACEMENT

Fastener Tightening Specifications: Refer to Fastener Tightening Specifications.

Preliminary Procedures

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

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

CAUTION:

Refer to Brake Fluid Irritant Caution .

1

Retainer, Front Disc Brake Pad (Qty: 2)
Tip: The front disc pad retainers (Qty: 2) secure the front disc brake pad
pins (Qty: 2) into the caliper and hold the pad assembly and hardware
together.

2

Pin, Front Disc Brake Pad (Qty: 2)

3

Clip, Front Disc Brake Caliper Damping

4

Pad Assembly, Front Disc Brake Inner
Tip:

1. Compress the pistons into the caliper bores.

2. Pump the brake pedal in order to seat the new brake pads, then road

test the vehicle in order to burnish the brake pads. Refer to Brake Pad
and Rotor Burnishing.

5

Shim, Front Brake Pad Vibration

6

Pad Assembly, Front Disc Brake Outer

7

Insulator, Front Disc Brake Outer Pad

2007 Hummer H3

2007 BRAKES Disc Brakes - H3