It's crucial to check your owner's manual for the specific recommendations from Chevrolet. While a 50/50 mix of ethylene glycol and distilled water is generally suitable, the manual might specify a particular type of coolant (e.g., Dex-Cool) or have other important notes.
Important Considerations:
* Dex-Cool: GM vehicles often used Dex-Cool, a type of extended-life coolant. Check your owner's manual to see if your S-10 originally used Dex-Cool. Mixing different types of coolant can be problematic. If you're unsure, flushing the system and using only Dex-Cool is the safest bet.
* Distilled Water: Always use distilled water, not tap water, to prevent mineral deposits that can damage your cooling system.
* Protection: A 50/50 mix provides adequate protection against freezing and overheating in most climates. Adjust the ratio based on your expected winter temperatures if necessary. Consult a coolant chart for proper ratios.
In short, consult your owner's manual first. If you can't find it, a 50/50 mix of ethylene glycol-based coolant (considering Dex-Cool compatibility) and distilled water is a generally safe starting point, but always prioritize the manufacturer's recommendations.
