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The cabin air filter in your 2004 Cadillac DeVille filters the air that is blown from your heater or air conditioner into the cabin of your DeVille. You need to change it at least once a year or every 20,000 miles. Replacing the cabin air filter (also know as the dust filter, hvac filter, pollen filter, air conditioner filter and hepa filter) will improve the air quality of your DeVille, will put less strain on your heating and air conditioning system and can increase your gas mileage. These filters are fairly inexpensive, so check out our parts page for great deals on a new one (tip: buy several - they don't expire and you will be able to quickly swap the old one out for a fresh one).
Not all Cadillacs have a cabin air filter and for some models, the inclusion of a cabin air filter depends on what trim level you have (DTS). Newer cars are more likely to have a cabin air filter than older models. If your DeVille has a funky odor when you turn on the heat or air conditioner, or it seems like the fan doesn't work as well as it used to, replacing your cabin air filter is a quick and cheap fix! The video above shows you the cabin air filter location in your DeVille and how to change it!
Minor transmission fluid leaks can often be fixed with the right sealant - see how to do this2004 Cadillac DeVille DTS 4.6L V8
Animals love the sweet smell of antifreeze, too bad it's toxic! Fix your minor leaks2004 Cadillac DeVille DTS 4.6L V8
If you have an electrical component that doesn't work, try replacing the fuse first2004 Cadillac DeVille DTS 4.6L V8
There's no reason to check the washer fluid level without adding some - see how to do it here!2004 Cadillac DeVille DTS 4.6L V8
Do you ever get into your friend's car and notice a bad smell? A dirty cabin air filter could be the culprit2004 Cadillac DeVille DTS 4.6L V8
Your coolant should perform well under any condition - just like Aaron Rodgers!2004 Cadillac DeVille DTS 4.6L V8