Never use a generator inside your home, basement, or garage or near a window, door, or vent.
Never run a car or truck in the garage with the garage door shut. CO can build up quickly while your car or truck is running in a closed garage.
If you drive a vehicle with a liftgate or tailgate, when you open the gate you also need to open vents or windows to make sure air is moving through the vehicle. With only the gate open, CO can build up in the vehicle.
Never run a vehicle inside a garage that is attached to a house and always open the door to any garage to let in fresh air when running a vehicle inside the garage.