The front wheel speed sensor is installed in the hole of the front suspension steering knuckle.
To replace the sensor, follow these steps.
1. Disconnect the wire from the negative terminal of the battery.
2. Remove the wheel from the side to be replaced.
3. Remove the front wheel arch liner (see "Removal and installation mudguards").
4. Remove the wheel speed sensor mounting screw...
5. ...and remove the sensor from the mounting hole in the front suspension steering knuckle.
6. Pull out the lock...
7. ...and disconnect the sensor wiring harness connectors on the front suspension subframe.
8. Disconnect the wiring harness from the retaining clip and remove it together with the sensor.
9. Similarly, replace the front wheel speed sensor on the opposite side.
10. Install the front wheel speed sensor in the reverse order of removal.
Warnings: When installing the sensor, precisely align the hole on its body with the threaded hole in the knuckle. Do not rotate the sensor around the longitudinal axis during installation. An increase in resistance to the sensor movement should be felt only in the last 2 mm before it is fully seated in the knuckle. If the sensor enters the knuckle hole with great resistance from the very beginning of installation, remove the sensor and eliminate the cause of jamming (dirt, burrs on the body, etc.). It is strictly forbidden to press in the front wheel speed sensor with a hammer.
The rear wheel speed sensor is installed in the hole in the brake caliper bracket.
To replace it, follow these steps.
1. Disconnect the wire from the negative terminal of the battery.
2. Remove the wheel from the side to be replaced.
3. Remove the rear wheel arch liner (see "Removal and installation mudguards").
4. Remove the sensor mounting screw...
5. ...and remove it from the hole in the brake caliper bracket.
6. Remove the wiring harness from the retainer on the rear suspension bracket.
7. Remove the wire harness from the retainer on the vehicle body.
8. Press the lock of the wiring harness connector...
9. ...and disconnect the rear wheel speed sensor wiring harness connectors.
10. Remove the rear wheel speed sensor.
11. Replace the rear wheel speed sensor on the opposite side in the same way.
12. Install the rear wheel speed sensor in the reverse order of removal.
Warning: When installing the sensor, precisely align the hole on its body with the threaded hole in the brake caliper bracket. Do not rotate the sensor around its longitudinal axis during installation. An increase in resistance to sensor movement should be felt only in the last 2 mm before it is fully seated in the bracket. If the sensor enters the bracket hole with great resistance from the very beginning of installation, remove it and eliminate the cause of jamming (dirt, burrs on the body, etc.). It is strictly forbidden to press in the rear wheel speed sensor with a hammer.
(The source of the article is available on the website: «CHEVYMAN»)