2002 Cadillac Escalade Owner's Manual - Page 318

Engine Air Cleaner/Filter The air cleaner assembly has an air filter restriction indicator that lets you know when the engine air cleaner/filter is dirty and needs to be serviced. The air filter restriction indicator is located on the air cleaner cover. See "Engine Compartment Overview" in the Index for more information on location. See "Owner Checks and Services" in the Index to determine when to check the indicator. The service window (A) with the percentage scale shows the amount of engine air cleaner/filter life used. When both service window (A) and service window (B) turn orange, replace the engine air cleaner/filter. After changing the engine air cleaner/filter, press the button on top of the air filter restriction indicator to reset it. Your engine air cleaner/filter is located in the air filter housing near the front corner of the engine compartment on the passenger's side of the vehicle. See "Engine Compartment Overview" in the Index for more information on location. 6-17