Tesla is now planning to reveal its first electric big-rig truck in November — here's everything we know (TSLA)

Tesla semitruck

Elon Musk is making Tesla fans wait a little bit longer before he gives them a glimpse of the company's upcoming big-rig.

Musk had originally said the company would reveal a prototype of the vehicle in September. He then pushed the reveal date back to October 26. And on Friday he delayed the reveal date yet again.

The electric-car maker is now expected to reveal the electric big-rig on November 16, Musk said in a tweet on Friday.

Musk said he is delaying the reveal again to focus on Model 3 production, which has been lagging, and to ramp up battery production for Puerto Rico.

Besides the reveal date, Musk hasn't said much about the upcoming vehicle. However, some details have leaked about what we might see.

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Tesla has been working with truck makers on the vehicle's design.

Tesla CEO Elon Musk said the company was working with major truck companies to design Tesla's all-electric big rig.

"We are showing off a working prototype at the end of September, but we have shown it to people who buy heavy-duty trucking, and they all love it. They just want to know how many can they buy and how soon," Musk said during Tesla's annual shareholder meeting, hosted in July at the Computer History Museum in Mountain View, California.

"We are getting them closely involved in the design process," he added.

Tesla is including the companies in the design process because it helps ensure their needs are met, Musk said.

Tesla may announce some of its trucking partners at the event.

Because Tesla has already said it has been working with trucking companies on the design, it's possible the automaker could share who some of these partners are.

They could include large truck carriers as well as shippers, according to a recent note from Morgan Stanley analysts Ravi Shanker and Adam Jonas. Tesla could also be working with the trucking companies Schneider National and XPO, as well as FedEx, according to Jonas.