Rinse and pat dry the pork tenderloin pieces. Season with your favorite steak seasoning, or use a combination of salt, pepper, and garlic powder sprinkling evenly over the pork.
Set the slow cooker to the stovetop or browning mode; add the olive oil, and brown the tenderloins on all sides. You might need to work in two batches so you don’t overcrowd the vessel. This is an important step, if your slow cooker does not have a browning mode, brown the tenderloins on your cooktop in a skillet.
Once the tenderloins are well browned, place in the slow cooker and add the BBQ sauce to cover.
Add a few tablespoons of water to each empty BBQ sauce bottle, give it a good shake, and add the liquid to the slow cooker.
Set the slow cooker to high and cook for 4 hours. Turn the tenderloins every couple of hours, reduce the slow cooker to low, and cook for another 2-3 hours or to the point that the meat simply falls apart.
Using two forks, gently pull apart the pork to the desired size, mix, and serve.