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Home >> Chevrolet >> 2017 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Hybrid/EV System Heating And Cooling) >> Description and Operation >> Hybrid/EV Cooling System Description and Operation >> Passenger Compartment Heater System Description and Operation

Passenger Compartment Heater System Description and Operation

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Fig 1: Passenger Compartment Heater System
GM4316073Courtesy of GENERAL MOTORS COMPANY
Callout Component Name
1 Engine Coolant Surge Tank
2 Engine Connection
3 12 V Auxiliary Heater Coolant Pump
4 Heater Core

The passenger compartment heater system uses the engine radiator, a 12 V auxiliary heater coolant pump, an exhaust gas heat recovery system and a heater core.

The engine control module turns on the auxiliary heater coolant pump when passenger compartment heating is needed during the Autostop (engine off) hybrid mode. Passenger compartment heat is provided by air flowing through the heater core.