Who is responsible for attaching the required labeling that defines the vehicle's capability?

The responsibility for attaching the required labeling that defines the vehicle's capability falls primarily to the upfitter. Upfitters modify vehicles for specific purposes beyond their standard factory configuration and must ensure that any appropriate labels reflecting the vehicle's capabilities, such as weight limits, towing capacity, or modifications made, are properly affixed.

This labeling is imperative for safety, regulation compliance, and to inform users of how the vehicle should be operated under various circumstances, especially after alterations made during the upfitting process. Upfitters are knowledgeable about the specific requirements that these labels must meet based on local regulations and the type of modifications performed.

Manufacturers typically provide the base vehicle and its standard labels but do not handle modifications post-production. Dealers may offer guidance or act as intermediaries but do not engage directly in the upfitting process to the extent that the upfitter does. Customers are the end users and do not have the responsibility or authority to modify and label vehicles officially. Thus, the upfitter holds the critical role in ensuring these labels are appropriately applied, reflecting the modified capabilities of the vehicle accurately.