2007 Buick Lucerne Owner's Manual - Page 342

Engine Air Cleaner/Filter See Engine Compartment Overview on page 334 for the location of the engine air cleaner/filter. To inspect or replace the filter, do the following: 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 (83 000 km) interval. See Scheduled Maintenance on page 442 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. 1. Loosen and remove the two screws on the top of the engine air cleaner/filter cover. 2. Lift up the outboard side of the cover at an angle while pulling toward you. This is necessary due to the two hinges located on the inboard side of the cover. 3. Remove the engine air cleaner/filter element and any loose debris that may be found in the air cleaner base. 4. Inspect or replace the air filter element. 342