Permanently OFF GM vehicle AFM, DOD service 1998 - 2018 vehicles V6, V8, 4.3, 4.8, 5.3, 6.0, and 6.2 engines. We remove the automatic cylinder deactivation set by the manufacturer. Using advanced tuning software, we make permanent adjustments to disable standard activation, ensuring it never activates again to optimize your vehicle’s performance. We provide convenient mail-in service and on-site support throughout the Atlanta Metro area. For questions, email us at karcheckzemail@gmail.