The time it takes to cook a 2.39 lb. tenderloin in a Crock-Pot varies, but should be between four to six hours. If a cook wishes to change the consistency of the meat, the time it takes to cook will differ.
Crock-Pots also have different settings, which either speed up or slow the process of cooking a tenderloin. The low setting cooks the meat slower, while the high setting almost doubles the speed of the low setting. Different recipes will call for a low or high setting, depending on how the consistency of the meat is supposed to be. Pot roasts, for example, are commonly cooked on a low setting.