GM will offer a free service to owners of 2012-2013 Chevrolet Volt extended-range electric vehicles, to resolve an issue with battery coolant.
Some Volts were not filled with the proper amount of coolant in the Rechargeable Energy Storage System (RESS)--their propulsion batteries--due to air present in the cooling circuit. Over the first 12 months on the road, the Volt's battery's cooling system purges any remaining air, which could leave it with coolant levels lower than those required.
When this happens, a DTC (Diagnostic Trouble Code) may be triggered, displaying the message "Service High Voltage Charging System." If this happens, the charging system for the vehicle's hybrid battery will shut down until service is performed, the code is purged, and the light is reset.
GM dealers will check the cooling system level for the hybrid battery. If it is up to proper level, no further service will be required. If the coolant level is found to be low, the technician will conduct a hybrid battery cooling system pressure test to make sure there are no coolant leaks. If no leaks are found, the technician will fill the cooling system, purge the air out of the it, then top it off to proper level.
Should a leak be found, the dealer will recommend repairs. If the vehicle is still under warranty, the repair will be covered. If the vehicle is out of warranty, the repair cost will be the responsibility of the customer. After proper repairs have been made to the system, it will be filled, pressure tested, purged and topped off.
GM is managing this service campaign by VIN (Vehicle Identification Number). The best way to determine of a vehicle is involved in this action from GM is to call local dealers with the VIN of the vehicle in question.
For more info or answers to questions, contact GM Customer Service at 800-222-1020 and reference Service Campaign # 14114, RESS Battery Coolant Level Low.___________________________________________
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