REG 4008 – Declaration of Gross Vehicle Weight (Fillable PDF)

The REG 4008 – Declaration of Gross Vehicle Weight is required by the California Department of Motor Vehicles (DMV) for any commercial motor vehicle that operates at a Gross Vehicle Weight (GVW) or Combined Gross Vehicle Weight (CGW) of 10,001 lb or more. Our fillable PDF version lets you complete the form quickly, accurately, and without printing.

What Is the REG 4008 Form?

This form captures the vehicle’s weight specifications, including axle configuration, GVW, and CGW. It ensures that the DMV has the correct data for registration, licensing, and safety compliance.

Who Must File This Form?

• Owners or lessees of commercial motor vehicles ≥ 10,001 lb GVW.
• Vehicles used for freight, passenger transport, or any commercial purpose.
• Pick‑up trucks with modified bodies that exceed the weight threshold (standard pickups are excluded).

How to Complete the REG 4008 Online

Instead of downloading the PDF and using a separate editor, simply click the "Fill out this form" button on this page. The Formize PDF Filler app will load the fillable version in seconds. Follow the on‑screen prompts to enter your data, then save, print, or submit directly to the DMV.

Common Mistakes to Avoid

• Entering the vehicle’s curb weight instead of the gross weight.
• Leaving the "Date of Inspection" blank.
• Using an outdated VIN or license plate number.
• Failing to sign the form electronically before submission.

Where to Submit the Completed Form

After you finish, you can:

• Print and mail the form to your local DMV office.
• Upload the completed PDF through the DMV’s online portal (if available).
• Bring the printed copy to a DMV field office for immediate processing.

Need help? Review the California DMV weight‑declaration guidelines for detailed instructions.