Can you tell us a little more about your business? Without good credit, might be hard in this market - but you may have other factors that could help you.
There are trucking finance companies that can provide equipment loans and leases (including trucks and other vehicles). There are also non-bank finance companies that can provide gas cards for your drivers - essentially an advance until you get paid from your customers. There are also factors that will advance on your invoices - giving you the funds now to purchase trucks - these are then paid back when your customers pay you - might even get an advance on future invoices that you will generate with the new truck(s). The reason I mention these is that these loan products are not really based on your credit - but the credit of your customers.
That is about all that I can say now until we get more information about you and your company.