How to fix a Co237 in a 2003 Chevy Trailblazer

Question

Also where is the rear wheel speed sensor located?

Answer 1

The C0327 code is for the Reas Wheel Speed Sensor. The sensor is mounted on the rear wheel hub. Unfortunately, the C0237 code doesn't specified which side is the problem, you have to inspect both Rear Wheel Speed Sensors.

C0237 CHEVROLET - Erratic Rear Speed Signal
Read more: https://www.autocodes.com/c0237_chevrolet.html