Dex-Cool
dex-cool coolant is used in most 3.1 engines,
Best thing to do is but the universal coolant, it can be used in all vehicles.
the red coolant. the pink coolant is used for newer model.
For a 2000 GMC Yukon XL, it is recommended to use an antifreeze that meets the GM specification, typically the Dex-Cool coolant. This is an orange-colored, long-life antifreeze designed for use in GM vehicles. It's important to avoid mixing it with other types of antifreeze, especially conventional green coolant, to prevent potential chemical reactions and system damage. Always consult the owner's manual for specific recommendations.
The factory coolant is a red, five year, HOAT type coolant.
Green coolantGreen coolant
R134a
Standard anti-freeze.
Most 2000 GM cars were filled with the RED Dexcool coolant. Using the standard green fluid after the Dexcool has been used can lead to clogged coolant passages and destroy the engine.
It is a H.O.A.T.(hybrid organic additive technology) red coolant.
134a