The best way to get to the block heater screw plug is from a 45 degree side angle instead of straight down past the valve cover and ignition sticks that are in the way. Unplug the connector that goes to the front O2 sensor by depressing the tab on it and pulling up on it. (yellow circle) Unplug the O2 sensor connector from the metal bracket by depressing the tab on it and pushing it downwards. Unbolt the bolt holding the bracket (yellow dot) using a 14 mm socket. Lift the automatic transmiss