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Yes, been there,done that.The Brazilian version of the Silverado used diferent engines from the US/Canada version. Here GM used a 6 cylinder gasoline and a 4 cylinder diesel (maybe 6 cyl, not sure). But for parts like fenders, hoods, interior trim, etc. you will be able to find interesting things in our "ebay-like" plataforms, such as Mercado Livre and OLX. For instance, my C1500 uses a 5 nut wheel (5x5) and the brake rotors aren't avaliable around here.