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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1138 (HVAC System - Automatic) >> Diagnostic Information and Procedures >> Blower Motor Malfunction >> Circuit/System Verification

Circuit/System Verification

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.
  1. Ignition ON, switch the Climate Control System to the manual setting. Press the fan speed control button from the lowest to highest setting. The blower motor speed should change between commanded states.
  2. Press the power button located on the driver's side of the climate control panel to turn the entire climate control system ON or OFF. The blower motor should turn OFF.
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