US made blue chip (GMC) trucks did not come with Chevrolet motors. I thought by the first part of the blue chip series all Canadian GMC trucks were running the same motors as US made GMC trucks, but I don't recall documentation for that so it could be wrong.
Unless you can prove this is a factory truck you're going to be arguing about that motor as long as its in the truck.
Send Bobb a private message and get him reading this thread. If anyone knows if that motor is stock he would.
