1996 GMC Sonoma Owner's Manual - Page 293

Section 7 Maintenance Schedule IMPORTANTKEEP ENGINE OIL AT THE PROPER LEVEL AND CHANGEAS RECOMMENDED This section covers the maintenance required for your vehicle. Your vehicle needs these services to retain its safety, dependability and emission control performance. 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 quality of the air we breathe. Improper fluid levels or the wrong tire inflation can increase the level of emissions from your vehicle. To help protect our environment, and to keep your vehicle i n good condition, please maintain your vehicle properly. I protection 7-1