1996 Chevrolet Suburban Owner's Manual - Page 302

Air Cleaner To avoid the possibility of un-filtered air being drawn into the engine, make sure the air cleaner coveris on straight and the wing nuts are properly tightened. If there is an arrow on the air cleanercover, it should point to the front of the engine. Refer to the Maintenance Schedule to determine when to replace the air fi 1ter. See "Scheduled Maintenance Services" in the Index. NOTICE: If the air cleaner 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 in place when you're driving. 6-25