DETROIT — President Donald Trump on Tuesday signed an executive order softening some of the automotive tariffs his administration put into place earlier this month, as the car industry grapples with regulatory uncertainty and additional costs due to the levies.

Tariffs of 25% on imported vehicles into the U.S. will continue, but the new measures aim to reduce the overall tariff level on vehicle imports that had resulted from separate levies — such as an additional 25% tariffs on steel and aluminum — “stacking” on top of one another.

Under the order, additional 25% tariffs on auto parts that were set to start by May 3 will also still take effect, but vehicles that go through final assembly in the U.S. will be able to qualify for partial reimbursements on those levies for two years.

Those parts-related reimbursements include potential offsets of an amount equal to 3.75% of the value of a U.S.-made car that’s assembled before May 1, 2026. After that, the reimbursement cap is lowered to 2.5% of the car’s value until April 30, 2027, according to the order.

The administration said it calculated those rates by applying a 25% duty to 15% of the value of a U.S.-assembled vehicle in the first year, and a 25% duty to 10% of that value in the second year.

It’s unclear how an automaker would get such a reimbursement, but the offer is retroactive to when the tariffs took effect on April 3.

“We just wanted to help them during this little transition,” Trump said Tuesday. “If they can’t get parts, we didn’t want to penalize them.”

Trump is scheduled to visit Michigan on Tuesday to celebrate his first 100 days back in the Oval Office.

The easing on auto tariffs follows automakers and auto policy groups lobbying the Trump administration for some relief, particularly from the “stacking” effect of multiple duties.

Last week, six of the top policy groups representing the U.S. automotive industry, including the Alliance for Automotive Innovation that represents most major automakers, uncharacteristically joined forces to lobby the Trump administration against implementing the upcoming tariffs on auto parts.

“President Trump has indicated an openness to reconsidering the administration’s 25 percent tariffs on imported automotive parts – similar to the tariff relief recently approved for consumer electronics and semiconductors. That would be a positive development and welcome relief,” the groups said in a letter to Trump officials.

The groups — representing franchised dealers, suppliers and nearly all major automakers — said the upcoming levies could jeopardize U.S. automotive production and noted many auto suppliers are already “in distress” and wouldn’t be able to afford the additional cost increases, leading to broader industry problems.

Ahead of the company reporting its first-quarter results Tuesday, General Motors CFO Paul Jacobson told reporters that “future impacts of tariffs could be significant.”

In response to the regulatory uncertainty and expected cost increases, GM discontinued its 2025 guidance, which did not take tariffs into account; suspended stock buybacks; and delayed its quarterly investor call by two days until Thursday.

Automakers expressed appreciation for the expected changes, but continue to face significant cost increases.

“Ford welcomes and appreciates these decisions by President Trump, which will help mitigate the impact of tariffs on automakers, suppliers and consumers,” Ford CEO Jim Farley said in an emailed statement Tuesday.

Stellantis Chair John Elkann echoed those remarks: “Stellantis appreciates the tariff relief measures decided by President Trump. While we further assess the impact of the tariff policies on our North American operations, we look forward to our continued collaboration with the U.S. Administration to strengthen a competitive American auto industry and stimulate exports.”

GM CEO Mary Barra also thanked Trump, saying it was “helping level the playing field for companies like GM and allowing us to invest even more in the U.S. economy.