2007 Cadillac Escalade Owner's Manual - Page 408

Engine Air Cleaner/Filter See Engine Compartment Overview on page 402 for the location of the engine air cleaner/filter and the air filter restriction indicator, if the vehicle has one. When to Inspect the Engine Air Cleaner/Filter If your vehicle has 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, inspect the air cleaner/filter at the Maintenance II intervals and replace it at the first oil change after each 50,000 mile (83 000 km) interval. See Scheduled Maintenance on page 517 for more information. If you are driving in dusty/dirty conditions, inspect the filter at each engine oil change. 408