1996 Chevrolet Tahoe Owner's Manual - Page 278

Engine Coolant The cooling system in your vehicle is filled with new DEX-COOL TM (orange-colored, silicate-free) engine coolant. This coolant is designed to remain in your vehicle for 5 years or 100,000 miles (166 000 km), whichever occurs first. The following explains your cooling system and how to add coolant when it is low. If you have a problem with engine overheating, see "Engine Overheating" in the Index. NOTICE: When adding coolant it important that you use is DEX-COOL (orange-colored, silicate-free) coolant meetingGM Specification 6277111. If silicated coolant is added to the system, premature engine,heater core or radiator corrosion may result. In addition, the engine coolant will require change sooner at 30,000 miles (50 000 km) or 24 months, whichever occurs first. -- A 50/50 mixture of water and the proper coolant for your vehicle will: Give freezing protection down to -34°F (-37°C). 0 Give boiling protection up to 265 "F (129 " C). Protect against rust and corrosion. Help keep the proper engine temperature. Let the warning gages work as they should. 6-25