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In the manual for your 2009 Chevy Impala, it suggests using a 50/50 mixture of DEX-COOL coolant and water. This blend is recommended for maintaining optimal performance in both hot and cold environments, effectively preventing overheating. Coolant maintenance is minimal, with a recommended change every 60,000 miles. If you find your coolant levels low, check for leaks. When refilling, ensure levels stay within the min and max markings on the reservoir.
Prestone extended life 50/50 dex cool antifreeze and coolant is the top choice for keeping your 2009 Chevy Impala running smoothly.