I do not believe the AC compressor is covered under the Voltec warranty. The Voltec warranty only covers specific items such as the lithium battery pack, the two electric motors and the on-board charger. The radiator cores, for example, serve to cool the battery, the electronics, the drive unit and the ICE yet no part of the radiator is covered by the Voltec warranty.
This is what my warranty booklet says:
WHAT IS COVERED
This limited warranty covers repairs to Hybrid specific component defect related to materials or workmanship occurring during the 8 years or 100,000 miles (160,000 kilometers) term for the following:
Other Voltec Components
Other components covered by the Voltec warranty include: high-voltage wiring, Voltec control modules, e-compressor
Traction Power Inverter Module (TPIM), Accessory Power Module (APM) and Voltec on-board charger.
In addition to the coverages above, the brake modulator assembly is also covered by the 8-year/100,000-mile Voltec
Electric Hybrid/Drive Unit
Electric drive unit assembly electric motors, and all internal components, including the auxiliary fluid pump, auxiliary
pump controller, electric motor, and 3-phase cables.
During the 8-year /100,000-mile Voltec warranty period, towing is covered to the nearest Chevrolet servicing dealer if
your vehicle cannot be driven because of a warranted Voltec-specific defect. Contact the Chevrolet Roadside Assistance Center for towing. Refer to the Owner’s Manual for details.
Other Electric/Hybrid Components
High Voltage Wiring, Hybrid Powertrain, and Battery Control Modules, Air Compressor Control Module (Except Malibu
Hybrid), Accessory DC Power Control Module, High Voltage Battery Disconnect Control Module, Drive Motor Generator
Power Invertor Module, Battery Charger Control Module.
DRIVE MOTOR BATTERY COVERAGE
Propulsion Battery Limited Warranty Policy (Chevrolet Volt and Bolt EV)
High Voltage Wiring, Hybrid Powertrain, and Battery Control Modules, Air Compressor Control Module (Except Malibu Hybrid), Accessory DC Power Control Module, High Voltage Battery Disconnect Control Module, Drive Motor Generator Power Invertor Module, Battery Charger Control Module.