2007 Cadillac STS Owner's Manual - Page 239

Passenger Compartment Air Filter Your vehicle may be equipped with a passenger compartment air filter. There are two types of filters available. There is a standard dust filter that traps small particles including pollen. There is, also, a dust/odor filter available that traps dust and pollen and also uses a charcoal element to help reduce many offensive odors from entering your vehicle. Like your vehicle's engine air cleaner/filter, it will need to be changed periodically. For information on how often to change the passenger compartment air filter, see Scheduled Maintenance on page 505. Notice: Driving without a passenger compartment air filter in place can cause water and small particles, like paper and leaves, to be pulled into your climate control system which may cause damage to it. Make sure you always replace the old filter with a new one. The access panel for the passenger compartment air filter is located under the hood near the windshield, on the passenger's side of the vehicle. See Engine Compartment Overview on page 373 for more information on location. See Doing Your Own Service Work on page 364 for information on doing your own service work. 239