I have a 2005 Avalanche. The rear air vents do not blow at all. I know thar it passes through the bottom of the center console but... no air. Any advise?
I have a 2009 Avalanche and my son noticed that as well. When I put the vent & heater on, then the rear vents had some heat going to them. I would have to try with just the Vents and just the Heater to see if the rear vents work with just one of those options turned on or if we need the Vent & Heater combination turned on for the rear vents to work.
The rear heater/vents have their own fan switch. (Mine does) Put the "off / on switch to the ON position. Mine has numbers from 0 to 5. The vents also can be closed at the exit ports, make sure they are open.
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