K Yukon/Denali 4WD V8-6.5L DSL Turbo VIN S (1999)
Air Register: Description and Operation
The electronically-actuated doors control airflow. At various positions of the rotary knobs on the control assembly, the mode doors mix and direct
cooled, heated, and outside air through the air distribution duct.
Ducts and Outlets
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 3 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
