WHERE IS THE REAR WHEEL ABS SENSOR LOCATED ON A 2002 TRAILBLAZER?

The rear wheel speed sensor is going to be located on top of the differential housing. That truck has a "3 sensor ABS" system. One at the rear axle and one at each front wheel. Hope this gets you going on the sensor... Jesus loves you, John 3:16-17 (KJV)

The traction control uses the ABS wheel speed sensors (1 on each wheel - usually in the wheel bearing assembly). The speed sensor is for your speedometer. Do you have an ABS light on too?

abs sensors are located at each wheel close to the hub and read off a segmented section on the hubs or rear axle

Most likely one of your ABS sensors are dirty or the wire has corroded. Common for the sensors to get dirty since there magnetic and a simple cleaning will fix this. The ABS sensors are on each wheel on the inner side and can be cleaned with brake parts cleaner. If there was rust from the rotor or dirty that got in between the speed ring and sensor, you most likely have to replace the sensor.
Start with cleaning and inspecting the sensors, it my just be dirt build up and the sensor needing realignment which is a quick fix. After that and you still have the ABS light on, one of your sensors have gone bad. Go to Auto Zone and buy the brake parts cleaner and have them scan your trailblazer for which ABS component when bad to help address which sensor it is and yes they scan free of charge.
Thank you for using fixya.

check your brake fluid level, brake system, wheel sensors. Dirty wheel sensors usually cause the ABS light to come on. As for the brake warning light, it may be low on fluid (possible leak) or faulty E-brake switch.

Both front wheel hub assembly would have those sensor they are also used for the abs. I am not sure on that year of caravans would have some on the rear wheel hub assembly also.

HAVE IT SCAN.AT DEALERSHIP.THEY HAVE TO USE A ABS SCANNER TO CHECK IT OUT.

There is no way to turn off the abs light. The system works through the abs module, even if that fuse is pulled the light will remain on.

The brakes will work but you will not have the abs safety working for you.

Have it fixed ASAP!!

normally read off your rear wheel abs sensor

have autozone scan it for free could be multiple things wrong wheel speed sensors to abs pump does it come right on after starting? or do you have to drive it???