Start it up and drive. Fuel injections, you don't need to warm them up. The computers will adjust the fuel and air on a cold motor, but on the Turbos, after a long or hard drive, you should let the motor idle a little before shutting down to cool down the turbo or turbos. The biggest difference between the turbo diesels and gas motors is the turbo ones takes a second or two to allow braking on a panic stop. Oil and fuel maintenance are different. Follow your book for details and you will have a 300,000 to 500,000 mile truck. Note: Use good fuel and not Bio fuels.