See also:

How to Inspect the Engine Air Cleaner/Filter
To inspect the air cleaner/filter, remove the filter from the vehicle and lightly shake the filter to release loose dust and dirt. If the filter remains covered with dirt, a new filter is required ...

Cooling System
If the vehicle has the Duramax® Diesel engine, see the Duramax® Diesel Supplement for more information. The cooling system allows the engine to maintain the correct working temperature. 5.3 L En ...

Climate Control Systems (with Air Conditioning)
With this system the heating, cooling, and ventilation can be controlled. A. Fan Control B. Temperature Control C. Air Delivery Mode Control D. Air Conditioning E. Outside Air F. Recirculation ...