I like the looks of the truck, although it's difficult to see how the wheel color fits with the truck color because of the poor lighting in the photo.
As you can see it's not a good idea to flash directly into pic, you only get it bounced right back at ya. Stay at an angle, or increase your lighting and use no flash.
If it was me I'd set this shot up outside on an cloudy/ overcast day. You get better overall lighting on an overcast day and that works the same for full size vehicles.
Also try different settings on your camera to see if there's a better result than just the auto mode.
Dan