2014 Chevrolet Spark EV Owner Manual - Page 244

10-8 Vehicle Care What to Use The TPIM, APM, and charger module coolant reservoir in the vehicle is filled with a 50/50 mixture of DEX-COOL coolant and deionized water. If using this mixture, nothing else needs to be added. The coolant needs to be replaced at the appropriate interval. See Maintenance Schedule on page 11-2. coolant level is below the cold fill line, there could be a leak in the cooling system. Cooling System (TPIM, APM, and Charger Modules) The Traction Power Inverter Module (TPIM), Accessory Power Module (APM), and Charger module are cooled using a separate coolant loop. The TPIM, APM, and charger modules in the vehicle are kept below a maximum temperature. If the temperature rises above this temperature, the electric cooling fan will turn on and cool the coolant until the correct temperature is reached. Checking Coolant The vehicle must be on a level surface when checking the coolant level. The TPIM, APM, and charger module coolant reservoir is in the underhood compartment. See Underhood Compartment Overview on page 10-6. 1. TPIM, APM, and Charger Module Coolant Reservoir 2. Heater Coolant Reservoir Check to see if coolant is visible in the TPIM, APM, and charger module coolant reservoir. If coolant is visible but the coolant level is below the cold fill line, there could be a leak in the cooling system. The TPIM, APM, and charger module coolant should only be serviced by a qualified technician.