2008 Cadillac CTS Owner's Manual - Page 303

Engine Air Cleaner/Filter The engine air cleaner/filter is in the engine compartment on the driver's side of the vehicle, near the front. See Engine Compartment Overview on page 5-14 for more information on location. To inspect or replace the engine air cleaner/filter, do the following: 1. Turn the ignition off. When to Inspect the Engine Air Cleaner/Filter Inspect the air cleaner/filter at the Maintenance II intervals and replace it at the first oil change after each 50,000 mile (80 000 km) interval. See Scheduled Maintenance on page 6-4 for more information. If you are driving in dusty/dirty conditions, inspect the filter at each engine oil change. How to Inspect the Engine Air Cleaner/Filter To inspect the air cleaner/filter, remove the filter from the vehicle and lightly shake the filter to release loose dust and dirt. If the filter remains caked with dirt, a new filter is required. 2. Remove side cover by pulling up on front of cover. 5-21