The tank is a chocolate roll cake with marshmallow cream filling. We added 2 cherry Twizzlers on the top, and rolled in fondant. The truck is made of 2 loaf size cakes and cut to desired size. They are covered in chocolate icing. The wheels are fudge covered Oreos. I used white icing to make the lines on the wheels.
All other parts are made of fondant. We used a silver color made my Wilton and a small brush and dusted it all over the white. Making the chrome color. Red hots were used for the brake lights. We also used black gel to make the grill on the front. I strongly recommend dusting all your fondant parts the color you want before adding them to the cake.
We covered a PC of cardboard in foil to set the tank on. Otherwise it would have fallen.