K 1500 Truck 4WD V8-4.8L VIN V (1999)
Air Duct: Description and Operation
A one-piece air distributor duct directs air to the passenger compartment. The air distributor duct attaches to the instrument panel with snap-in style
retainers and screws.
In the case of poor air output, inspect the air distributor duct for the following obstructions.
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Leaves
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Dirt
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Other objects that may fall into the air distributor duct from the passenger compartment