Hybrid Cooling: Coolant
WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
The drive motor/generator control module assembly is cooled by a solution made up of a 50-50 mixture of DEX-COOL® and De-Ionized water. De-Ionized water is required to prevent corrosion from effecting heatsink performance. The coolant solution carries excess heat away from the drive motor/generator control module assembly to the radiator, where the heat is dissipated to the atmosphere. Always use pre-mixed coolant and never use tap water in the power electronics coolant system.