1995 GMC Safari Owner's Manual - Page 247

Malfunction Indicator Lamp (SERVICE ENGINESOON LIGHT) This lighton your instrument panel lets you know when your emission system needs service. The light will come on briefly when you start your engine to letyou know that the system is working. If it does not come on when you start your engine, or if it comes on and stays on while you're driving, your system may need service. Your vehicle should still be driveable, but vou should have your system serviced right away. Tires We don't make tires. Your new vehicle comes with high quality tires made by a leading tire manufacturer. These tires are warranted by the tire manufacturers and their warranties are delivered with every new vehicle. If your spare tire is a different brand than your road tires, you will have a tire warranty folder from each of these manufacturers.