Air Delivery Improper - Auxiliary

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. 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 Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2	Turn ON the ignition, with the engine OFF. Turn OFF the HVAC controls. Is the blower motor OFF?	Go to Step 3	Go to Blower Motor Always On - Auxiliary
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
4	Does the auxiliary blower motor operate at the desired speed?	Go to Step 5	Go to Blower Motor Malfunction - Auxiliary
5	Turn ON the ignition, with the engine OFF. Place the blower motor switch ON. Place the mode switch from the floor position to the upper outlets position. With a scan tool, observe the Auxiliary Mode Door Commanded parameter in the HVAC data list. Does the Auxiliary Mode Door Commanded parameter 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 Control Module References in Computer/Integrating Systems for replacement, setup and programming. 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