Chevrolet Silverado: Driving and Operating / Engine Exhaust

Extended Parking

It is best not to park with the vehicle running. If the vehicle is left running, be sure it will not move and there is adequate ventilation. See Shifting Into Park and Engine Exhaust...

Engine Exhaust

Warning Engine exhaust contains carbon monoxide (CO), which cannot be seen or smelled. Exposure to CO can cause unconsciousness and even death. Exhaust may enter the vehicle if: The vehicle idles in areas with poor ventilation (parking garages, tunnels, deep snow that may block underbody airflow or tail pipes)...

Other information:

Chevrolet Silverado 2019-2025 Owners Manual: Shifting out of Park

This vehicle is equipped with an electronic shift lock release system. The system is designed to prevent movement of the shift lever out of P (Park), unless the brake pedal is applied and the ignition is on or in Service Mode. The shift lock release is always functional except in the case of an uncharged or low voltage – less than 9 volt – battery...

Chevrolet Silverado 2019-2025 Owners Manual: Battery Load Management

The vehicle has Electric Power Management (EPM), which estimates the battery's temperature and state of charge. It then adjusts the voltage for best performance and extended life of the battery. When the battery's state of charge is low, the voltage is raised slightly to quickly bring the charge back up...