1996 Cadillac DeVille Owner's Manual - Page 281

Engine Coolant The cooling system in vehicle is filled with new your DEX-COOL (orange-colored,silicate-free) engine coolant. This coolant is designed to remain in your vehicle for5 years or100,000miles (166 0o0 km), whichever occurs first. The following explains your cooling system and to how add coolant when it low. If you have a problem with is engine overheating, see "Engine Overheating" in the Index. NOTICE: When adding coolantit is important thatyou use DEX-COOL (orange-colored, silicate-free) coolant meetingGM Specification 6277M. If silicated coolant is added the system, to 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) or24 months, whichever occurs first. TM -- A 50/50 mixture of water and the proper coolant for your Cadillac will: Give freezing protection down -34°F (-37 O C). to Give boiling protectionup to 265"F(129" C ) . 0 What to Use Use a mixtureof one-half clean water (preferably distilled) and one-halfDEX-COOL (orange-colored, silicate-free) antifreeze that meets Specification GM 6277M, which won't damage aluminum parts. Use GM Engine Coolant Supplement (sealer) Part (GM No. 3634621) with any complete coolant change. you If to use this mixture, you don't need add anything else. A special procedure is required adding sealer; see the for Cadillac service manual.(To order a service manual, see "Service and Owner Publications" the Index.) in Protect against rust and corrosion. Help keep the proper engine temperature. Let the warning lights and gages work they should. as 6-20