1993 Chevrolet Lumina Owner's Manual - Page 207

Air Cleaner Refer to theMaintenance Schedule to determine when to replace the air filter and the PCV filter. See the Index under Scheduled Maintenance Services. P A I ITlnN Operating the engine with L L the air cleaner off can cause you or others to burned. The air be cleaner not only cleansthe air, it stops flame if the engine backfires. If it isn't there, and the engine backfires, you could beburned. Don't drive with it off, and be careful workingon theengine with the air cleaneroff. I I To Check or Replace (L4Engine): .Use a screwdriver to loosen the hose it clamp. Lf the rubber duct. 3 Remove the air cleanerfilter. . 4. Install the air cleaner filter, cover, wing nut and rubber duct. Be sure to tighten the hose clamp. + If the air cleaner is . a backfire can cause a damaging engine fire And, dirt can easily get into your engine, whichwill damage it. 2. Remove the wing nut and lift the cover.