March 6 (Reuters) - The Trump administration is considering pushing back auto tariffs on Canada and Mexico by a month, according to people familiar with the matter. Administration officials met Tuesday with the heads of Ford Motor (F. N), General Motors (GM. N) and Stellantis (STLA. N) to discuss the matter. Another meeting on possible tariff relief will be held at the White House on Wednesday. Detroit's major automakers have been actively seeking to halt or modify Tron's tariff policy, which they fear could have a catastrophic impact. Automakers and experts have warned that imposing a 25 percent tariff on neighboring countries would lead to higher costs, almost immediately raise car prices by thousands of dollars, and paralyze supply chains.