2007 Cadillac STS Owner's Manual - Page 387

3. Loosen the clamp and remove the duct from the passenger's side of the engine air cleaner/filter. 4. The two sides of the airbox are hinged at the bottom. Open the airbox by pushing the top of the airbox cover toward the engine. 5. Remove the air filter by lifting it straight up through the opening in the airbox. 6. Inspect or replace the engine air cleaner/filter. See Normal Maintenance Replacement Parts on page 518 for the correct part number for the filter. 7. Reinstall the cover by reversing Steps 1 through 4. If your vehicle has the 4.4L V8 STS-V engine, there is a special procedure for checking and changing the air cleaner/filter. Because this procedure is difficult, you should have this done at the dealership service department. Contact your dealer for additional information or the procedure can be found in the service manual. To purchase a service manual, see Service Publications Ordering Information on page 543. {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 flames 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. 387