What color is Dexcool antifreeze?
The Dexcool antifreeze color is orange—the signature hue GM uses for its long-life coolant formulations.
Why Dexcool is orange
Dexcool uses an Organic Acid Technology (OAT) formula designed for extended service life. The orange dye is applied to differentiate it from conventional green or blue coolants and to help technicians avoid cross-contamination during maintenance.
Color variations you might notice
In practice, the orange can range from bright orange to amber or reddish-orange, depending on the batch, dye load, lighting, and the coolant’s age. Even when fresh, the shade can look different under certain lights, but the underlying chemistry remains orange.
Handling and compatibility considerations
When refilling, use the Dexcool-appropriate product for your GM vehicle and avoid mixing with non-OAT or non-compatible coolants unless GM specifically allows it. Mixing can lead to reduced cooling efficiency or precipitates that compromise engine protection.
Dexcool in the broader market
Other brands offer orange OAT coolants as well, but each product has its own chemical formulation. Always check the vehicle’s owner manual and the coolant label to ensure you’re using the correct type, even if the color matches orange.
Key takeaways
Dexcool is designed to be orange in color; color cues can help identify the product, but always rely on labels and manufacturer guidance for compatibility.
Summary: Dexcool antifreeze is orange, a distinctive dye used in GM’s long-life coolant. The shade can vary slightly with lighting and age, but orange remains the defining color, and proper usage requires following GM’s guidelines to avoid incompatibilities.
