1995 Pontiac Bonneville Owner's Manual - Page 235

Engine Coolant The following explains your cooling system and how to add coolant when it is low. If youhave a problem with engine overheating, see "Engine Overheating" in the Index. The proper co'olantfor your Pontiac will: 0 Give freezing protection down to -34°F (-37°C). Give boiling protection up to 262°F (128 "C). Protect against rust and corrosion. Help keep the proper engine temperature. Let the warning Sights work as they should. 0 0 What to Use Use a mixture of one-half clean water (preferably distilled) and one-half antifreeze that meets "GM Specification 1825M,?' which won't damage aluminum parts. You can also use a recycled coolant conforming to GM specification 1825M with a complete coolant flush and refill. Use GM Engine Coolant Supplement (sealer) with any complete coolant flush and refill. If you use this mixture, you don't need to add anything else. NOTICE: If you use an impropercoolant nrsix, yuur engine could overheat and be badlydamaged. The repair cast wouldn't be mvmd by your warranty. T ~ o much water i the mix e m freeze n and crack the engine,radiabl; heater core an'd other p a 6-22