You got yourself the Brand new GMC YUKON in the Denali trim and as you got in the Driver seat you heard the new GM Chime that is new to you, this has a Automatic transmission and the interior has all the bells and whistles Welcome, Please fasten your Seatbelt and obey all instructions for a safe trip. You may Start the Car by pressing the Brake pedal first then Inserting the key into the ignition and then turning it.