2011 Chevrolet Colorado Extended Cab Owner's Manual - Page 264

10-18 Vehicle Care 4. Reinstall the engine air cleaner/ filter cover. Fasten the clips to hold the cover in place. When to Inspect the Engine Air Cleaner/Filter Inspect the air cleaner/filter at the scheduled maintenance intervals and replace it at the first oil change after each 80 000 km (50,000 mi) interval. See Scheduled Maintenance on page 11‑2 for more information. If you are driving in dusty/dirty conditions, inspect the filter at each engine oil change. Cooling System The cooling system allows the engine to maintain the correct working temperature. { WARNING Operating the engine with the air cleaner/filter off can cause you or others to be burned. The air cleaner not only cleans the air; it helps to stop flames if the engine backfires. Use caution when working on the engine and do not drive with the air cleaner/filter off. Notice: If the air cleaner/filter is off, dirt can easily get into the engine, which could damage it. Always have the air cleaner/filter in place when you are driving. How to Inspect the Engine Air Cleaner/Filter To inspect or replace the engine air cleaner/filter, do the following: 1. Unfasten the clips that hold the cover on and remove the cover. 2. Lift out the engine air cleaner/ filter. 3. Inspect or replace the air filter. See Maintenance Replacement Parts on page 11‑9 to determine which filter to use. 2.9 L L4 Engine Shown (3.7 L L5 Engine Similar) A. Coolant Recovery Tank B. Engine Cooling Fan (Out of View) C. Radiator Pressure Cap