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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1138 (HVAC System - Automatic) >> Diagnostic Information and Procedures >> DTC B3933 >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
    IMPORTANT: For this test. A thermometer can be used to test the sensor off the vehicle in warm and or cold water.
  1. Test the evaporator air temperature sensor by varying the sensor temperature while monitoring the sensor resistance.
  2. Compare the readings with the Temperature VS Resistance table and verify that the resistance is within 5 percent of the specification.
    • If not within the specified range, replace the sensor.
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