The Detroit automaker is farthest along in the effort to make more of the critical breathing machines.
"I've enacted the Act, we've used it three of four times", Trump said, which is a lie, claiming "the companies came through in the end they didn't need the Act".
Jim Hackett-the CEO of the Ford Motor Company-said this week he would answer the call to help.
They could cobble together about 170,000, including some simpler versions that won't work in all cases, said Dr. Lewis Rubinson, chief medical officer at Morristown Medical Center in New Jersey and lead author of a 2010 medical journal article on the matter.
Despite the attack on GM, it appears the government has made a decision to buy ventilators from the automaker.
GM said in a statement in response to Trump it has been working with ventilator firm Ventec Life Systems and GM suppliers "around the clock for over a week to meet this urgent need" and said its commitment to Ventec's ventilators "has never wavered".
Stocks nosedive on Wall Street
The S&P 500 lost 324.89 points, or 11.98%, to 2,386.13 and the Nasdaq Composite dropped 970.28 points, or 12.32%, to 6,904.59. Monday's trading halt marks the third time since the coronavirus outbreak that US markets have paused activity.
Keep up to date on the growing threat to global health by signing up for our daily coronavirus newsletter. They added they have the ability to supply 10,000 more devices each month after that. GM had planned to start production in April regardless of whether there was a federal contract in place, the person said.
Trump though promised Friday that more ventilators were coming.
"FORD, GET GOING ON VENTILATORS, FAST!" he said.
"We have just purchased many Ventilators from some wonderful companies", he said in a separate tweet.
The Epoch Times refers to the novel coronavirus, which causes COVID-19, as the CCP virus because the Chinese Communist Party's coverup and mismanagement allowed the virus to spread throughout China before it was transmitted worldwide. New York, Michigan, Louisiana and the state of Washington have been singled out as virus hot spots in the U.S. According to a source familiar, GM is continuing to prepare its facilities and both General Motors and Ventec are working on the assumption that the government deal will happen but understand that even if it does not, there is a need and a market for ventilators.
"If we make too many that's going to be OK because I spoke to the Prime Minister of the United Kingdom yesterday", Mr Trump said. I said, "How you doing?' and he said, 'We need ventilators". Trump said. "You know, 'everybody who needs one.' Nobody's ever done what we've done, nobody's done anything like we've been able to do..." "And now, all of a sudden they're saying can we order 30,000 ventilators".
The decision followed 24 hours of confusion in which Trump initially expressed scepticism about the dire warnings of ventilator shortages, particularly in NY, where medical officials say the situation is desperate.
The President said the PM issued an instant plea to him regarding the machines when they spoke after Mr Johnson's positive test for Covid-19.