2005 Buick Park Avenue Owner's Manual - Page 253

{CAUTION: 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 flame if the engine backfires. If it is not there and the engine backfires, you could be burned. Do not drive with it off, and be careful working on the engine with the air cleaner/filter off. Notice: If the air cleaner/filter is off, a backfire can cause a damaging engine fire. And, dirt can easily get into your engine, which will damage it. Always have the air cleaner/filter in place when you are driving. 3. Inspect or replace the engine air cleaner/filter. 4. Reattach the air intake hose. 5. Reinstall the air cleaner housing cover. 5-21