Tesla CEO Elon Musk on Friday teased the company’s upcoming electric semi truck along with four new global Gigafactory locations. Musk gave attendees at the 2017 TED Conference in Vancouver a sneak peek at Tesla’s forthcoming semi truck, according to TechCrunch. While he didn’t reveal much, you could see that the windshield extends to the upper facade of the vehicle, while the headlights resemble ones seen on existing Tesla cars. Join the conversation: Follow @SVbizjournal on Twitter, "Like"…