Question about 2007 Chevrolet Silverado 2500HD
If you are referring to a restricted air flow in the cabin of your truck then it can quite possibly be something obstructing the intake blower of your fan motor system.
On the pass. side you will find the opening where the fan intake is, near the floorboard, make sure there is nothing up in the opening obstructing the airway.
You wouldn't believe how many times I have found plastic bags, and newspaper up there.
If you can, get a flashlight and shine up past the toe guard as I like to call it, and see if you can see inside the dashboard where the squirrel cage is, this is a round blower that has fins on it.
The fins should be clean and free of hair and debris, if so then you may very well have a vacuum leak in one of your hoses.
Check to make sure that the recirculate switch works, that can also be a source to your problems.
Hope this helped.
Posted on Mar 04, 2009
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