fuse for trailer power on 2005 Chevrolet Silverado 2500 HD

I have no power to the hot to charge the trailer battery, where is the fuse?

Under the hood on the driver's side above the wheel well, there is a fuse box. If you purchsed your truck new, the wire harness for the trailer brakes should have been in the glovebox. Taped to the wire harness was the fuse. They leave it out from the factory until you connect the trailer brakes. Look for a blank spot and verify it from the lable under the lid.