2002 Buick Rendezvous Owner's Manual - Page 364

CAUTION: Operating the engine with the air cleaner/filter off can cause you or others to be burned. The air cleaner not only cleans the air, it stops flame if the engine backfires. If it isn't there, and the engine backfires, you could be burned. Don't drive with it off, and be careful working on the engine with the air cleaner/filter off. Passenger Compartment Air Filter (If Equipped) Passenger compartment air, both outside and recirculated air, is routed through a passenger compartment filter, which is part of a two-piece filter system. The filter removes certain contaminants from the air, including pollen and dust particles, as well as odors such as exhaust or fuel fumes. Reductions in airflow, which may occur more quickly in dusty areas, indicate that the filter needs to be replaced early. For how often to change the air filter, see "Scheduled Maintenance" in the Index. If your vehicle has the automatic comfort control system with the digital display, your vehicle comes with the passenger compartment air filter element installed. If your vehicle has the manual comfort control system, your vehicle does not have a passenger compartment air filter element installed. If you would like to put a filter in, follow these steps for filter replacement. NOTICE: If the air cleaner/filter is off, a backfire can cause a damaging engine fire. And, dirt can easily get into your engine, which will damage it. Always have the air cleaner/filter in place when you're driving. 6-17