General Motors’ Canadian workers represented by Unifor have approved a labor agreement securing next-generation heavy-duty GMC Sierra production at Oshawa and channeling more than C$1 billion (about US$720 million) into Ontario plants under rising U.S.-Canada trade pressure. The package includes C$144 million (US$103.63 million) at Oshawa, a C$691 million (US$497.30 million) commitment for new V8 engines in Ontario announced earlier in April, and previously detailed C$215 million at St. Catharines for next-generation transmissions from late 2029, or roughly C$1.1 billion in total. Ratified by about 4,600 Unifor members, the deal keeps the Ingersoll CAMI assembly plant open for the duration of the agreement and provides 3% yearly wage increases over three years. GM Canada President Jack Uppal said the pact improves wages, benefits, and job security. The United States already applies 25% tariffs on Canadian-built vehicles, and President Donald Trump has threatened to raise tariffs on Canadian cars, trucks, auto parts, and steel to 50% on January 1, 2027, accusing Canada of a $60 billion trade surplus while saying firms can avoid duties by shifting production to the U.S. Barclays research indicates Canada accounts for roughly 17% of Chevrolet Silverado output, GM’s best-selling pickup.