News
Tesla Semi trucks make a surprise Supercharger visit on way to Fremont factory
Elon Musk’s Tesla Semis were recently sighted at a Supercharger station near Sacramento, CA, before heading into I-80 on a westward route towards the Bay Area.
The two electric trucks were spotted at the Rocklin Supercharger station near Sacramento, which is located roughly halfway between the Fremont factory and Gigafactory 1. As noted by the online community, several Tesla workers seemed to be taking readings from the vehicles as the two electric trucks were parked.
Videos of the Tesla Semis on the Rocklin Supercharger were uploaded by YouTube channel My Tesla Adventure, who was also able to film the two electric trucks taking off into the street. Another YouTuber, going by the handle CWINDOWSsystem32, was also in the area, and he was able to capture the incredibly futuristic sound of the trucks’ four Model 3-derived electric motors as the long-hauler rolled through the streets.
The My Tesla Adventure host opted to follow the two electric trucks in his Tesla Model S as the vehicles entered the freeway. Just like a previous Semi sighting where the long-range variant of the electric truck displayed tire-shredding acceleration, the two massive long-haulers showed impressive speed as they took the ramp onto I-80.
-
- Tesla Semi at the Rocklin, CA Supercharger in Sacramento [Photo: My Tesla Adventure via YouTube]
-
- Tesla Semi at the Rocklin, CA Supercharger in Sacramento [Photo: My Tesla Adventure via YouTube]
After accelerating to catch up to the two electric trucks, the Model S owner was able to follow the Tesla Semis as they maintained highway speeds. The YouTube channel host stated that the trucks were traveling at about 60 mph.
Interestingly, the matte black short-range Tesla Semi seemed to be carrying a different cargo than the one it was pulling when it was featured on Tesla CEO Elon Musk’s personal Instagram page. When Musk posted an image of the electric long-hauler recently, it was pulling a trailer marked P5190683. In this recent sighting, however, it was pulling a trailer marked P41801089.
As we noted in a previous report, Musk’s recent Instagram post featured the two electric trucks ready to deliver battery packs from the Nevada Gigafactory to the Fremont facility. Both the silver Tesla Semi, the company’s 500-mile all-electric long-range hauler and shorter range electric truck in matte black, were featured in Musk’s photo.
Considering that the distance between the two facilities spans just over 250 miles (400 km), both the long-range and shorter range Tesla Semi can presumably travel the entire length of the route without needing to recharge. The over 4,000 feet total elevation drop from Tesla’s Gigafactory 1 and its California factory can also aid the electric long-haulers in successfully completing their runs, as the Tesla Semi’s regenerative braking system would recapture lost energy on descents and result in a range increase in certain areas of the journey.
Tesla made a change to the Cybertruck, and nobody noticed. But to be fair, nobody could have, but it was revealed by the program’s lead engineer that it was aimed toward simplifying manufacturing through a minor change in casting.
After the Cybertruck was given a Top Safety Pick+ award by the Insurance Institute for Highway Safety (IIHS), for its reputation as the safest pickup on the market, some wondered what had changed about the vehicle.
Tesla makes changes to its vehicles routinely through Over-the-Air software updates, but aesthetic changes are relatively rare. Vehicles go through refreshes every few years, as the Model 3 and Model Y did earlier this year. However, the Cybertruck is one of the vehicles that has not changed much since its launch in late 2023, but it has gone through some minor changes.
Most recently, Wes Morrill, the Cybertruck program’s Lead Engineer, stated that the company had made a minor change to the casting of the all-electric pickup for manufacturing purposes. This change took place in April:
We made a minor change on the casting for manufacturability in April. Our Internal testing shows no difference in crash result but IIHS only officially tested the latest version
— Wes (@wmorrill3) December 17, 2025
The change is among the most subtle that can be made, but it makes a massive difference in manufacturing efficiency, build quality, and scalability.
Morrill revealed Tesla’s internal testing showed no difference in crash testing results performed by the IIHS.
The 2025 Cybertruck received stellar ratings in each of the required testing scenarios and categories. The Top Safety Pick+ award is only given if it excels in rigorous crash tests. This requires ‘Good’ ratings in updated small and moderate overlap front, side, roof, and head restraints.
Additionally, it must have advanced front crash prevention in both day and night. Most importantly, the vehicle must have a ‘Good’ or ‘Acceptable’ headlights standard on all trims, with the “+ ” specifically demanding the toughest new updated moderate overlap test that checks rear-seat passenger protection alongside driver safety.
Tesla has entered an interesting situation with its Full Self-Driving suite in California, as the State’s Department of Motor Vehicles had adopted an order for a suspension of the company’s sales license, but it immediately put it on hold.
The company has been granted a reprieve as the DMV is giving Tesla an opportunity to “remedy the situation.” After the suspension was recommended for 30 days as a penalty, the DMV said it would give Tesla 90 days to allow the company to come into compliance.
The DMV is accusing Tesla of misleading consumers by using words like Autopilot and Full Self-Driving on its advanced driver assistance (ADAS) features.
The State’s DMV Director, Steve Gordon, said that he hoped “Tesla will find a way to get these misleading statements corrected.” However, Tesla responded to the story on Tuesday, stating that this was a “consumer protection” order for the company using the term Autopilot.
It said “not one single customer came forward to say there’s a problem.” It added that “sales in California will continue uninterrupted.”
This was a “consumer protection” order about the use of the term “Autopilot” in a case where not one single customer came forward to say there’s a problem.
Sales in California will continue uninterrupted.
— Tesla North America (@tesla_na) December 17, 2025
Tesla has used the terms Autopilot and Full Self-Driving for years, but has added the term “(Supervised)” to the end of the FSD suite, hoping to remedy some of the potential issues that regulators in various areas might have with the labeling of the program.
It might not be too long before Tesla stops catching flak for using the Full Self-Driving name to describe its platform.
Tesla Robotaxi goes driverless as Musk confirms Safety Monitor removal testing
The Robotaxi suite has continued to improve, and this week, vehicles were spotted in Austin without any occupants. CEO Elon Musk would later confirm that Tesla had started testing driverless rides in Austin, hoping to launch rides without any supervision by the end of the year.
Tesla stock (NASDAQ: TSLA) closed at an all-time high on Tuesday, jumping over 3 percent during the day and finishing at $489.88.
The price beats the previous record close, which was $479.86.
Shares have had a crazy year, dipping more than 40 percent from the start of the year. The stock then started to recover once again around late April, when its price started to climb back up from the low $200 level.
This week, Tesla started to climb toward its highest levels ever, as it was revealed on Sunday that the company was testing driverless Robotaxis in Austin. The spike in value pushed the company’s valuation to $1.63 trillion.
Tesla Robotaxi goes driverless as Musk confirms Safety Monitor removal testing
It is the seventh-most valuable company on the market currently, trailing Nvidia, Apple, Alphabet (Google), Microsoft, Amazon, and Meta.
Shares closed up $14.57 today, up over 3 percent.
The stock has gone through a lot this year, as previously mentioned. Shares tumbled in Q1 due to CEO Elon Musk’s involvement with the Department of Government Efficiency (DOGE), which pulled his attention away from his companies and left a major overhang on their valuations.
However, things started to rebound halfway through the year, and as the government started to phase out the $7,500 tax credit, demand spiked as consumers tried to take advantage of it.
Q3 deliveries were the highest in company history, and Tesla responded to the loss of the tax credit with the launch of the Model 3 and Model Y Standard.
Additionally, analysts have announced high expectations this week for the company on Wall Street as Robotaxi continues to be the focus. With autonomy within Tesla’s sights, things are moving in the direction of Robotaxi being a major catalyst for growth on the Street in the coming year.
Tesla made a change to the Cybertruck and nobody noticed
Tesla enters interesting situation with Full Self-Driving in California
