2009 GMC Sierra 1500 Crew Cab Owner's Manual - Page 432

Engine Air Cleaner/Filter If the vehicle has a diesel engine, see "Pickup Models" under "Engine Air Cleaner/Filter" in the DURAMAX® Diesel Supplement for the correct inspection and replacement procedures. See Engine Compartment Overview on page 5-16 for the location of the engine air cleaner/filter. Replacing the Engine Air Cleaner/Filter 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 (Gasoline Engine) on page 6-4 for more information. If driving on dusty/dirty conditions, inspect the filter at each engine oil change. 1. Locate the air cleaner/filter assembly. See Engine Compartment Overview on page 5-16. 2. Loosen the four screws on the cover of the housing and lift up the cover. How to Inspect the Engine Air Cleaner/Filter To inspect the air cleaner/filter, remove the engine air cleaner/filter from the vehicle by following Steps 1 through 7. When the engine air cleaner/filter is removed, lightly shake it to release loose dust and dirt. If the engine air cleaner/filter remains caked with dirt, a new filter is required. 5-22