You could always call the receptionist or HR department and ask them what would be appropriate, then dress on the nicer end of that.
Sweat pants that are real baggy........a t-shirt that is too small to cover your belly, ( it really helps if it says " I'm With Stupid" )and a dirty greasy truckers cap.
If its a bullhauler jeans are ok but otherwise a nice shirt, maybe a button down, khakis are OK. Come dressed like that I would probably hire you. Dress Wranglers, Black, Brown or tan are acceptable if they fit. A lot of people waste time giving ignorant answers but consider the source. They probably live like a pig, never wash a truck, and eat grease and gravy, and can't reach the table or a steering wheel.
Just be true to yourself. But I do hope that means you are dressed for work. So wear your best work clothes and have good personal hygiene. You will be representing your company to some extent as well as yourself.
A modest hairstyle, starch button up shirt, and pressed jeans. They know you're a woman and you're coming in for the job. Sometimes that can be a bad thing though. Usually, the only other woman that ever worked there complained about everything to everyone, thought that every man she met was a pig that wanted in her pants and if he didn't, he was closeted gay. So they might think that you will be like another lady driver they know. Want to wow them? Be positive. Don't sit there discussing every thing that ever went wrong at your old company. All they need to know is that it was a positive experience but you want to step up or into a better position. Be professional. I love a good war story, but job interviews are not the place for war stories. Stick with the fact. You've been driving for X amount of years, and you have pulled several different kinds of wagons, a tanker is what you want to be yanking. keep your business YOUR business. No husband (unless he works there), no boyfriend (unless he works there), no dogs ( unless the dog is going on the truck with you), no drama, no personal business. You're all about the job. They couldn't get the other woman to shut up. Yu sure don't want them to think you are another version of that woman that everyone hated. Anyways, let us know how it goes.
I think a Versace or else Dior and match with a Gucci handbag, Coach is so passé these days. For shoes I'd go with Testoni, Jimmy Choo's are so SITC. I think you can figure out the other accessories.
Thanks everyone! I know it seemed like a stupid question to some, but it was my first driver interview. I had enough suits and dresses for a month for my old job, but it didn't help me here. My old jeans weren't cutting it either so I ended up buying a pair of khaki's, which was fine. The interview went well. Thanks again.
Justmom , We all wish you the best of luck....AFWIW , the only stupid question , is the one that never gets asked. Keep us posted posted on your progress.
Justmom, I think you will do OK. There are stupid questions in the world but yours wasn't one of them. Appearances do matter and we all put either too much or too little priority on them.