Tax Deductions on Trucks/SUVs for Small Business

Hello all,

Does anyone know (or have a link that explains) the tax deductions available on trucks and SUVs for small businesses? I own my own business where I am the only employee and drive a lot for it.

I would like to get a small truck or an SUV (something like a Ranger or a Rav4) if I can get a tax break. I currently deduct my mileage using the standard rate.

Thanks all