ABS - Wheel Speed Sensor Replacement Revision

File In Section: 05 - Brakes

Bulletin No.: 02-05-25-002

Date: June, 2002

SERVICE MANUAL UPDATE

Subject:
Revised Wheel Speed Sensor Replacement Procedure

Models:
1999-2000 Cadillac Escalade
1999-2001 Chevrolet Silverado, Suburban, Yukon
1999-2001 GMC Sierra, Suburban, Tahoe

This bulletin is being issued to revise the Wheel Speed Sensor Replacement procedure in the Antilock Brakes sub-section of the Service Manual. Please replace the current information in the Service Manual with the following information.

The following information has been updated within SI. If you are using a paper version of this Service Manual, please make a reference to this bulletin on the affected page.

Wheel Speed Sensor Replacement (RWD) - 1999-2000

Caution:
Refer to Brake Dust Caution in Cautions and Notices.

Removal Procedure

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

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

3. Remove the brake rotor (2). Refer to Brake Rotor Replacement Front in Disc Brakes.

4. Remove the wheel speed sensor (WSS) mounting bolt.

5. Remove the wheel speed sensor (5) from the hub/bearing assembly (4).

6. Remove the WSS cable mounting clip from the knuckle.

7. Remove the WSS cable mounting clip from the upper control arm.

8. Remove the WSS cable mounting clip from the frame attachment point.

9. Remove the WSS cable electrical connector.

Installation Procedure

1. Install the WSS (5) into the hub/bearing assembly (4).

Notice:
Refer to Fastener Notice in Cautions and Notices.

2. Install the WSS mounting bolt.

Tighten

Tighten the WSS mounting bolt to 18 N.m (13 lb ft).

3. Install the WSS cable mounting clip to the knuckle.

4. Install the WSS cable mounting clip to the upper control arm.

5. Install the WSS cable mounting clip to the frame attachment point.

6. Connect the WSS cable electrical connector.

7. Install the brake rotor (2). Refer to Brake Rotor Replacement - Front in Disc Brakes.

8. Install the tire and wheel. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.

Wheel Speed Sensor Replacement (S4WD) - 1999 - 2000

Caution:
Refer to Brake Dust Caution in Cautions and Notices.

Removal Procedure

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

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

3. Remove the brake rotor (2). Refer to Brake Rotor Replacement - Front in Disc Brakes.

4. Remove the wheel speed sensor (WSS) mounting bolt.

5. Remove the wheel speed sensor (5) from the hub/bearing assembly (4).

6. Remove the WSS cable mounting clip from the knuckle.

7. Remove the WSS cable mounting clip from the upper control arm.

8. Remove the WSS cable mounting clip from the frame attachment point.

9. Remove the WSS cable electrical connector.

Installation Procedure

1. Install the WSS (5) into the hub/bearing assembly (4).

Notice:
Refer to Fastener Notice in Cautions and Notices.

2. Install the WSS mounting bolt.

Tighten

Tighten the WSS mounting bolt to 18 N.m (13 lb ft).

3. Install the WSS cable mounting clip to the knuckle.

4. Install the WSS cable mounting clip to the upper control arm.

5. Install the WSS cable mounting clip to the frame attachment point.

6. Connect the WSS cable electrical connector.

7. Install the brake rotor (2). Refer to Brake Rotor Replacement - Front in Disc Brakes.

8. Install the tire and wheel. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.

Wheel Speed Sensor Replacement (2WD) - 2001

Caution:
Refer to Brake Dust Caution in Cautions and Notices.

Removal Procedure

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

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

3. Remove the brake rotor (2). Refer to Brake Rotor Replacement - Front in Disc Brakes.

4. Remove the wheel speed sensor (WSS) mounting bolt.

Notice:
Carefully remove the sensor by pulling it straight out of the bore. DO NOT use a screwdriver, or other device to pry the sensor out of the bore. Prying it will cause the sensor body to break oft in the bore.

5. Remove the wheel speed sensor (5) from the hub/bearing assembly (4).

6. Remove the WSS cable mounting clip from the knuckle.

7. Remove the WSS cable mounting clip from the upper control arm.

8. Remove the WSS cable mounting clip from the frame attachment point.

9. Remove the WSS cable electrical connector.

Installation Procedure

1. Install the WSS (5) into the hub/bearing assembly (4).

Notice:
Refer to Fastener Notice in Cautions and Notices.

2. Install the WSS mounting bolt.

Tighten

Tighten the WSS mounting bolt to 18 N.m (13 lb ft).

3. Install the WSS cable mounting clip to the knuckle.

4. Install the WSS cable mounting clip to the upper control arm.

5. Install the WSS cable mounting clip to the frame attachment point.

6. Connect the WSS cable electrical connector.

7. Install the brake rotor (2). Refer to Brake Rotor Replacement - Front in Disc Brakes.

8. Install the tire and wheel. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.

9. Perform the Diagnostic System Check - ABS.

Wheel Speed Sensor Replacement (4WD) - 2001

Caution:
Refer to Brake Dust Caution in Cautions and Notices.

Removal Procedure

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

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

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