Truck or Pick-up

[putnam00]

So I have a topic that just bothers me. Why do people feel the need to correct me when I call my 71 c-10 a truck? They say I didn't know you drive a truck I thought it was a "pick-up". my wife and I both call it a truck and we both get corrected. is it just the area of the country we live in? the smart A$$ I am say if its not a truck then why does my license plate say commercial truck or if they have farm plates it says farm truck? So I'm just asking what does everyone else call them trucks or pick-ups?