The GP-15 has 2 screws under the front of the front truck and 2 screws under the back of the front truck. And 2 screws under the back end of the back truck. The front most 2 screws are the hardest to get too. Pull the hand rails from the sides of the cab and pull the body off of the frame. I have had my BN GP-15 body off a few times. Also watch out for the horns on top of the cab when removing the screws.
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