1998 Chevrolet Astro Owner's Manual - Page 287

Rear Axle When to Check and Change Lubricant Refer to the Maintenance Schedule to determine how often to check the lubricant and when to change it. See "Scheduled Maintenance Services" in the Index. What to Use Refer to the Maintenance Schedule to determine what kind of lubricant to use. See "Recommended Fluids and Lubricants" in the Index. Engine Coolant The cooling s stem in your vehicle is filled with DEX-COOL B engine coolant. This coolant is designed to remain in your vehicle for 5 years or 150,000 miles (240 000 km) whichever occurs first, if you add only DEX-COOL' extended life coolant. The following explains your cooling system and how to add coolant when it is low. If you havea problem with engine overheating, see "Engine Overheating" in the Index. A 50/50 mixture of water and DEX-COOL@ coolant will: Give freezing protection down to -34°F (-37°C). 0 0 How to Check Lubricant Give boiling protection up to 265 " F ( 129°C). Protect against rust and corrosion. Help keep the proper engine temperature. Let the warning lights and gages work as they should. If the level is below the bottom of the filler plug hole, you'll need to add some lubricant. Add enough lubricant to raise the level to the bottom of the filler plug hole. 6-25