Early Tuesday morning, while most people prepared to return to work after the New Years holiday, the president-elect of the United States decided to share his opinion about one small aspect of the operations of a major U.S. auto manufacturer.

General Motors is sending Mexican made model of Chevy Cruze to U.S. car dealers-tax free across border, Trump tweeted at 7:30 a.m. Make in U.S.A. or pay big border tax!

What prompted that tweet is puzzling.

Trump spent a lot of time last year bullying companies that shift production from the U.S. to Mexico, including auto companies, but GM had not recently made any Cruze announcements. It said it would make a version of the car in Mexico back in March 2015 .

Trump has sometimes used Twitter to respond immediately to items he sees on TV , but cable news transcripts show no mention of the Chevrolet Cruze in the early hours on Tuesday. A spokesman for GM said he had no idea what caught Trumps attention. A spokesman for Trump didnt respond to a request for comment.

Trumps tweet did come hours before the Ford Motor Company announced that it had scrapped plans to build a new plant in Mexico in favor of expanding its investment at a factory in Flat Rock, Michigan. The company denied that Trump had any role in that switch, although Ford Executive Chairman Bill Ford Jr. told reporters that hed notified Trump prior to the announcement. Its not clear exactly when they communicated.

It could be that Trump, knowing Fords announcement was coming, tweeted about GM to suggest that he has been busy pressuring manufacturers to shift production back to the U.S. The president-elect has vowed to stop American companies from offshoring jobs, and news stories about a few high-profile examples could distract the public from the fact that hundreds of companies will continue to offshore jobs despite Trumps threats.

Yet the strangest thing about Trumps tweet is that GM actually does make the Chevy Cruze in the U.S., at a plant in Lordstown, Ohio. It produces a hatchback version in Mexico that it mostly sells in other countries.

All Chevrolet Cruze sedans sold in the U.S. are built in GMs assembly plant in Lordstown, Ohio, GM spokesman Patrick Morrissey said in an emailed statement. Of the 190,000 Cruzes sold in the U.S. last year, the company has said, just 2.4 percent were hatchbacks made in Mexico.

So Trump was exercised about 4,500 cars.