Over the last few months, there have been multiple complaints from Chevy Volt owners whose 120-volt charge cords overheated. 

GM will now replace the 120-volt chargers in all Volts sold so far -- roughly 9,500 vehicles -- with a new unit featuring a more heat-resistant cord and plug.

What changes? The plug. The 12" cord that connects the outlet to the charger has been upgraded to a more industrial looking plug and cord. The cord is now black and heavier gauge. The cord that connects the charger to the car remains the same (orange).

While the 120-volt chargers aren't meant for everyday charging, many Volt owners rely on them for topping off their battery packs or when traveling away from a dedicated electric vehicle charger, which can run cost thousands of dollars

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