How to Replace ABS Sensor 10-17 GMC Terrain

Difficulty: Advanced · About 120 min · Gmc Terrain

Replace a rear ABS wheel-speed sensor on a 2010–2017 GMC Terrain, remove and restore the parking-brake hardware carefully, and verify the warning light clears.

Steps

1. Raise the vehicle and remove the wheel

   Loosen the lug nuts on the ground, raise the rear, and support it securely. Remove the wheel and release the caliper from the rotor, hanging it without loading the hose.

2. Remove the rotor and parking-brake shoes

   Remove the rotor retaining screw and lift off the rotor. Photograph the shoe layout, then remove the return springs, adjuster, and hold-down hardware to access the sensor.

3. Remove the old sensor

   Remove the sensor retaining bolt and gently work the sensor from its bore. Push its seal and wiring connector through the backing plate without pulling on the lead.

4. Install the replacement sensor

   Route the new sensor connector through the backing plate and connect it to the harness. Seat the sensor squarely in its bore, secure its fastener, and clip the wiring into its original retainers.

5. Reassemble the parking brake and rotor

   Clean the backing plate and install the shoes, adjuster, and springs in their original arrangement. Adjust the shoes, fit the rotor, and confirm it turns with slight, even drag.

6. Restore the caliper and wheel

   Clean the brake slides and reinstall the pads and caliper, tightening fasteners to specification. Refit the wheel, pump the pedal until firm, and torque lug nuts to specification.

7. Confirm ABS operation

   Start the vehicle and verify the ABS warning is off. If the fault remains, scan the ABS system and check sensor routing and connector seating before driving normally.

Check your vehicle’s repair manual for exact specifications and fit.