What type of coolant in a 2003 gmc Yukon XL?

For a 2003 GMC Yukon XL, the recommended coolant is a mixture of Dex-Cool, which is an orange-colored, extended-life coolant. It is crucial to use a 50/50 mixture of Dex-Cool and distilled water for optimal performance and to prevent corrosion in the engine. Always check the owner's manual for specific recommendations and guidelines.