Question about 2003 GMC Yukon Denali

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Unknown motor running inside headbord in rear cargo area

There is a small motor between the rear air vents inside the headboard that runs all the time when the car is turned on. What does this motor go to and why does it run all the time?

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Is the "Rear Air" control switch above the driver seat turned to "Rear" if so, turn it to "off" or Front and you can control the climate for the rear cabin. If this does not work, then a relay may be stuck.

Posted on Dec 30, 2008

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This is normally behind the floor kick panels in front or in the rear cargo area next to the Air-ride switch. The rear cargo area switch may be behind a plastic panel cover and is usually paired up with the Air-ride.

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Here is how the system works. The vehicle is suppose to stay low for loading and for passengers to get in and out of the vehicle. Every opening (Doors, Rear cargo lid) has to be shut before the AirRide pump will work. Then the pump will work and level the vehicle.

For the doors, it uses the doorjam switches and there is a jam switch in the cargo area opening too! This switch may look more like the one on a refrigerator or can run off the hinge mechanism. For the most part, the door ajar warning will tell you there is a problem in the openings.

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However, If it was leaking before you replaced the windshield, you'll probably have to disassemble the dash or whole dash area to find the actual leak source.
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Auto Expressions Vent Sticks: Wildberries Auto Air Freshener - 4 pk. ' Product Details ' Pep Boys

This is a link for what they look like.

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