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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 79 (HVAC - Manual) >> Diagnostic Information and Procedures >> Air Temperature Malfunction >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition ON, engine running, place the blower motor switch at the maximum speed position and the mode switch in the vent or panel position.
  2. Rotate the temperature control switch from the full COLD position to the full HOT position. The air temperature should follow the commanded states of full HOT to full COLD.