A truck driver is a person who is working as the driver of a truck for their living. Example of truck vehicles are semi trucks, box trucks, or dump trucks. This is a job which require a strong stamina, because they have to drive for hours, transporting finished goods and raw materials over land, typically to and from manufacturing plants, distribution centers, agents etc. So, make sure that you always check your health frequently if you want to choose this position as your jobs for a long period. Below is a cover letter sample that you can use if you plan to switch company and still applying for a truck driver job.

Dear Sir,
Please consider my qualifications advertised in My Truck Weekly for the position of MC truck driver in your company. I would like to be considered as a serious candidate of MC truck driver.
As a truck driver, I have more than 3 years of experience worked as a local truck driver. I have my own driving license and I keep the driving license up to date. I also have a clean report on MC license and Blue Card. Now, I am still developing my driving skill in order to improve my professional career.
I really love to learn and I completed the Fatigue Management Scheme course. I really enjoy meeting and building a good relationship with customers. Over 3 years, I have successfully delivered several goods and loads including chemical materials, fabric, timber, and any kind of dangerous goods.
Please contact me at your earliest convenience so that I may share with you my background and enthusiasm for the position.
Sincerely,
You can copy and paste the letter above but I provide the truck driver cover letter template in Microsoft Word version to ease you customizing it with your own words on describing your skills and experiences briefly.