2004 Cadillac Escalade EXT Owner's Manual - Page 322

Engine Air Cleaner/Filter See Engine Compartment Overview on page 5-10 for location of engine air cleaner/filter and air filter restriction indicator (if equipped). How to Inspect Vehicles with an Air Filter Restriction Indicator Locate the air filter restriction indicator on the engine air cleaner/filter cover. When the indicator turns black or is in the red/orange "change" zone, replace the filter and reset the indicator. See the steps following to replace the engine air cleaner/filter and to reset the air filter restriction indicator. Vehicles without an Air Filter Restriction Indicator When to Inspect If your vehicle is equipped with an air filter restriction indicator, it lets you know when the engine air cleaner/filter needs to be replaced. On vehicles with a restriction indicator, you should inspect the air filter restriction indicator at every oil change and replace the engine air cleaner/filter when the indicator tells you to. On vehicles without an air filter restriction indicator, you should inspect the air cleaner/filter at every oil change and replace it at the first oil change after 25,000 miles (40 000 km). See Scheduled Maintenance on page 6-4 for more information. To inspect the air cleaner/filter, remove the engine air cleaner/filter from the vehicle using the steps following. When you have the engine air cleaner/filter removed, lightly shake it to release loose dust and dirt. If the engine air cleaner/filter remains caked with dirt, a new one is required. 5-16