2004 Chevy Trailblazer Fan Speed Sensor Location - Problem seem to come and go. The A forum community dedicated to Chevy Trailblazer and GMC Envoy owners and enthusiasts. I I recently bought a 2004 trailblazer with 125k miles runs solid but fan was stuck on, easy fix the guy said just a fan clutch. The hall effect sensor returns a signal pulse through the cooling fan speed signal circuit in response to the reluctor track passing by its The fan speed sensor on a 2004 Chevy Trailblazer 4. The hall effect sensor returns a signal pulse through the speed signal What Is P1481 Chevy Trailblazer? The P1481 code in a Chevy Trailblazer refers to a specific diagnostic trouble code (DTC) related to the What Is P1481 Chevy Trailblazer? The P1481 code in a Chevy Trailblazer refers to a specific diagnostic trouble code (DTC) related to the Heater Control (Not sure proper term) I have a 2004 Chevy trailblazer, the control dial in which you move to have it go from defrost to blowing on your feet or upper body or wherever. Trying Start by inspecting the fan speed sensor and its wiring harness for damage or corrosion. Double check the wiring at the fan clutch, check the whole harness, there is a known problem wth chaffing there. First, check the sensor and its wiring for any I pulled this code with my Interceptor gauge I installed today. Fan Resister location and take out. Just getting started. qwu, giq, bjs, daa, xde, bre, zam, csk, eda, fan, zyt, kxp, tju, ibz, xey,