1998 GMC Safari Owner's Manual - Page 336

I IMPORTANT: KEEP ENGINE OIL AT THE PROPER LEVEL AND CHANGE AS RECOMMENDED I Introduction Your Vehicle and the Environment Proper vehicle maintenance not only helps to keep your vehicle in good working condition, but also helps the environment. All recommended maintenance procedures are important. Improper vehicle maintenance can even affect the qualityof the airwe breathe. Improper fluid levels or the wrong tire inflation can increase the level of emissions from your vehicle. help protect our To environment, and to keep your vehicle in good condition, please maintain your vehicle properly. protection I Plan I 7-2