Most people when they say "air filter" are referring to the engine air filter. Cabin air filter cleans the air that comes into the car, goes through the heater core or air conditioner and then out through the vents into the cabin of the car.
Carefully
in my 2004 deville, it is located under the backseat.
Yes, it is highly recommended you have it aligned.
The "DTS" as in Cadillac DTS stands for DeVille Touring Sedan. The Cadillac DTS replaced the Cadillac DeVille. The Cadillac DTS was first produced in 2005.
Assuming you mean 2008 Cadillac DTS (not data), see sources and related links below.
reddog: Can not find out how to get to the back of power outlet to unscrew it and replace it with a cigarette lighter.
Just had the dealership change mine… It's a whopping 8 quarts!
approx $600(100 part 500 labor)
Just push inward on the rear edge. It will pop right open.
DTS-SI
Cadillac DTS was created in 2005.