Analyze the relationship between 'GMC' and 'truck' within the context of the input sentence.
Options: parent organization, product/material produced, platform, location of formation

During the year, we launched on several models, including their new SUV lineup, the Cadillac Escalade, GMC Yukon and the Chevrolet Tahoe, adding to their full-size truck lineup that we launched in earlier.
product/material produced