Support

Mack Trucks has the tools, tips and resources you need to keep your truck—and your business—running smoothly.

Standard Rating Letter

Require an Standard Rating Letter for your Mack Truck? Submit your request here.

SUBMIT REQUEST

GCM Upgrade Letter

Requiring a GCM upgrade letter for your Mack Truck? Submit your request here.

SUBMIT YOUR REQUEST HERE

Body Builder

Ensuring communication between the customer, dealer and body builder with expert help before, during and after the sale.

New Users

Existing Users