Some vehicle accessories may be used after the ignition is turned off.
The power windows and sunroof, if equipped, will continue to work for up to 10 minutes or until any door is opened.
The infotainment system will continue to work for 10 minutes, until the driver door is opened, or until the ignition is turned on or placed in ACC/ACCESSORY.
Engine Heater
Shifting Into Park#PI1098: Battery Test Cold Cranking Amperage (CCA) for Original Equipment Batteries and Testing Tips - (Nov 6, 2013) Low Voltage Battery
Subject:Battery Test Cold Cranking Amperage (CCA) for Original Equipment Batteries and TestingTipsModels: 2012-2014 GM Cars and Trucks Correct battery cold cranking amperage (CCA) ratings and type are critical for propertest results when using the EL-50313. Access to the battery specification la ...