Take context from the input text and decide on the accurate relationship between 'Chevrolet Silverado' and 'General Motors' from the options provided.
Options: developer, manufacturer, product/material produced, subsidiary

John Rosevear TMFMarlowe Aug 9, 2015 at 9:12AM Workers assemble a Chevrolet Silverado 2500 HD at a General Motors factory in Flint, Mich. GM this week announced $877 million worth of upgrade plans for the Flint factory.
manufacturer