13. If the install got any easier, it would do it for you. All we had to do was plug the Max Energy into the OBD-II port under the driver side of the dash. We followed the on-screen prompts and answered the necessary questions. Voila, it took less than five minutes to do. As a bonus feature, the Hypertech programmer even showed the tech line phone number in case we did have any questions we could simply call while sitting in the Yukon. Now that is service.