Vehicle Questions and Answers
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The 2005 Chevrolet Tahoe is not too picky about what coolant you use, as long as you don't mix different types. The recommended coolant is Peak OET Antifreeze/Engine Coolant, NAO0B3, which you can get for about $25 per jug at most reputable auto part stores or online. Some people prefer Dex-Cool, which is also fine. Just be careful not to mix more than 15% of a different coolant. If you're unsure what coolant is currently in your Tahoe, it's best to do a full drain to prevent any potential damage to your engine from incompatible mixtures.
The advised coolant to use for a 2005 Chevrolet Tahoe is dex-cool.