Helga is my 2007 Duramax gal. I was finally able to locate the heating block plug thanks to YouTube and not the many GMC dealers or garage workers I've pestered over the years, but it doesn't seem to work. Is thete something else I need to do so it will work? Does it need a fuse? We have a diesel Ford and Dodge that work fine but I cannot figure out how to keep Helga warm on those cold nights. The end of the plug appears normal soo I assume it does not have a thermostat although I've been trying to use it in near zero weather.
Any help is greatly appreciated!
Rhonda
~R~