Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

SYS.OK|MANUAL.DB● LIVE

HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1284 (ANTILOCK BRAKE SYSTEM)REPAIR INSTRUCTIONSWHEEL SPEED SENSOR REPLACEMENT - REAR (AWD)INSTALLATION PROCEDURE

2003 Chevrolet TrailBlazer 4.2 S, 4WD

Installation Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Installation Procedure

WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Refer to FASTENER NOTICE .

Install the wheel speed sensor (2) to steering knuckle.

Fig 1: Installing Speed Sensor And Retaining Bolt
Courtesy of GENERAL MOTORS CORP.

Tighten

Tighten the rear wheel speed sensor bolt (1) to 8 N.m (71 lb in).
Install the bolt (1) and nut (2) which retains the wheel speed sensor harness to the upper arm and suspension member.

Fig 2: Installing Speed Sensor Bolt And Nut
Courtesy of GENERAL MOTORS CORP.

Tighten

Tighten the bolt and nut to 5 N.m (44 lb in).
Install the bolt (2) which retains the wheel speed sensor harness (1) to the vehicle.

Fig 3: Installing Speed Sensor Harness And Bolt
Courtesy of GENERAL MOTORS CORP.

Tighten

Tighten the bolt and nut to 5 N.m (44 lb in).
Reposition the wheel speed pigtail harness through the body. Install the grommet.
Connect the wheel speed sensor electrical connector (1).

Fig 4: Installing Electrical Connector
Courtesy of GENERAL MOTORS CORP.
Lower the vehicle.
Install the rear seat bottom and seat back. Refer to SEAT BACK REPLACEMENT - REAR SPLIT FOLDING in Seats.
Install the fuel tank filler pipe protector (1). Secure with 3 bolts (2).

Fig 5: Installing Fuel Tank Filler Pipe Protector
Courtesy of GENERAL MOTORS CORP.
Perform Diagnostic System Check - ABS .

RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready Tools Free Quote Check Quote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.