Engine Heater Plug on '08 Duramax

[rames14]

I know, why wait until it's -6 deg F to look for the darn heater plug. But I did. I went out tonight to find the plug to plug in the Duramax and couldn't find it. The owner's manual says it's on the driver's side by the power steering reservoir. No could find. Anyone found their's? Just curious. Probably won't need it, but it's going to be -10 tonight and tomorrow night and then -17 Thursday. I've found living in the upper midwest that the prolonged cold tends to have a bigger impact than just one cold shot. Any help is appreciated.