1996 GMC Sonoma Owner's Manual - Page 237

Operating theengine with the air cleaner off can cause you or others to be burned. The air cleaner not only cleans the air, it stops flame the engine if backfires. If it isn't there, and the engine backfires, you could be burned. Don't drive with it off, and be careful working on the engine with the air cleaner off. 2.2L Engine To remove this air cleaner, open both clamps and push the rear of the air cleanertoward the rear of the engine compartment. Insert a new air filter. Then replace the air cleaner assembly, making certain the PCV air tube is properly seated in the left hand valve cover and the clamps are securely fastened. Refer to the Maintenance Schedule to determine when to replace the air filter. See "Scheduled Maintenance Services" in the Index. ~ I NOTICE: If the air cleaner off, a backfire can cause a is 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. 6-15