Musk revealed that he is impressed with an amazing job the team has done and while no further details have been given, earlier rumors and hints from the company suggested that such vehicle is coming and could use some of the autonomous-driving features seen in Tesla cars.

Tesla Semi truck unveil set for September. Team has done an amazing job. Seriously next level.

— Elon Musk (@elonmusk) April 13, 2017

Previously, Musk stated that heavy-duty trucks and similar vehicles running on electric power have are needed and this could potentially be a huge market for the company. The noted that Tesla Semi, as it was referred then, will deliver a substantial reduction in the cost of transport while increasing safety.

Unfortunately, Musk did not reveal any further details so we do not know when it will be actually available or what kind of price is expected.

Plenty of other automotive companies are working on a similar vehicle, including Nikola Motor's Nikola One prototype, with hydrogen fuel cell batteries and natural gas range extender technology, Mercedes-Benz Urban eTruck, Mack's zero-emission drayage truck and others.

Tesla Inc stock rose by $7.16 or 2.41 percent and closed at $304.00 but the newest announcement could push it even further.