This is from the DMV of California's web site. Also, you may want to check and see if the truck will have all of the necessary California smog stuff. There is info on the site about CARB - California Air Resources Board - as it relates to new cars from other states without proper CARB certificatin.
Hope this helps.
How do I register my nonresident vehicle in California that was last registered in another state or country?
Your vehicle may be subject to California registration from the date of entry. Fees must be paid within 20 days from the date the vehicle entered California to avoid penalties.
You will need to:
Complete an Application for Title or Registration (REG 343)
Submit your out-of-state registration certificate
Submit your out-of-state title (If you have it)
Provide evidence of the California Smog Certification
Provide an odometer mileage certification (If your vehicle is less than 10 years old)
Bring your vehicle to a DMV office for verification of the vehicle's identification number (For your convenience, we recommend that you schedule an appointment by calling your local DMV
)
Pay the fees
Commercial vehicles, including pickup trucks, may also require a weight certificate.
Existing law imposes a use tax on a vehicle purchased outside of California and brought into California within 90 days of purchase. New legislation effective October 1, 2004 through July 1, 2006 requires payment of use tax on a vehicle purchased outside California and brought into California with 365 days of the purchase date.