Truck Safe Wildlife

I have a 2002 Chevy Silverado 1500. 4WD. 5.3L V8. (Completely stock except for K&N cold air intake system) My only concern is when I bought it, it had 255K miles. It runs like a champ. It was owned by the division of wildlife so I know it was taken care of and maintained. The engine wasnt rebuilt nor the transmission. Would it be safe to do off roading? or do I have a big risk of messing up something because I have so many miles? I understand risks happen when off roading and things can break no matter how many miles but is my truck more prone to break? Please include an actual reason instead of just "Yes" or "No". Thank you very much.