With your 2013 Volt you should have received a "2013 Chevrolet Limited Warranty and Owners Assistance Information" booklet (usually left in the glove compartment) . In that booklet you will find two sections that pertain to the Voltec-specific warranty. Pages 14-16 provide a high level overview of the Volt specific warranty. Pages 33-34 list the Voltec specific components. As dznf0g's noted below, warranty labor time guide may be more definitive, but if you asking a dealer service center to repair a Voltec component, being able to point them to the component as listed in your warranty booklet can sometime get warranty coverage.