Air Delivery Improper - Auxiliary (VIN 6 excluding Envoy XUV)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

Step	Action	Yes	No
Schematic Reference: HVAC Schematics Connector End View Reference: HVAC Connector End Views DEFINITION: The auxiliary mode doors cannot be adjusted.
1	Did you perform the HVAC Diagnostic System Check?	Go to Step 2	Go to Diagnostic System Check - HVAC Systems - Automatic
2	Recalibrate actuators. Refer to Re-Calibrating Actuators (Primary) Re-Calibrating Actuators (Auxiliary HVAC) . Turn ON the ignition, with the engine OFF. With a scan tool, observe the DTC list in Rear HVAC/RSA. Does the scan tool display DTC B0145, B0428, or B3531?	Go to Diagnostic Trouble Code (DTC) List	Go to Step 3
3	Turn ON the ignition, with the engine OFF. Place the front auxiliary blower motor switch in each speed position. Does the front auxiliary blower motor operate in any of the speed positions?	Go to Step 4	Go to Blower Motor Inoperative - Auxiliary (VIN 6 excluding Envoy XUV) or Blower Motor Inoperative - Auxiliary (VIN 3 including Envoy XUV)
4	Does the auxiliary blower motor operate at the desired speed?	Go to Step 5	Go to Blower Motor Malfunction - Auxiliary (VIN 6 excluding Envoy XUV) or Blower Motor Malfunction - Auxiliary (VIN 3 including Envoy XUV)
5	Turn ON the ignition, with the engine OFF. Place the front auxiliary blower motor switch in the Rear position. With a scan tool, observe the Console Mode Door actual and the Mode Door Actual parameter in the Rear HVAC/RSA data list. Place the auxiliary mode switch from the floor position to the upper outlets position. Does both the Console Mode Door and the Mode Door Actual parameters count value change?	Go to Step 8	Go to Step 6
6	Inspect for poor connections at the harness connector of the auxiliary HVAC control module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 8	Go to Step 7
7	Replace the auxiliary HVAC control module. Refer to HVAC Control Module Replacement - Auxiliary . Did you complete the replacement?	Go to Step 8	-
8	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2