These are genuine Bosch fuel injectors remanufactured by Bosch for the 2011 - 2016 LML 6.6l GMC Duramax engine.
This product contains an item which is sold exchange, meaning the old unit, or 'core' must be returned within 35 days of order shipment. We do not charge a core fee at the time of sale, however we must have a credit card on file before shipping your order. A standard copy of our core agreement form and warranty policy is available on our Core Policy Page at dieselcare.store.
These injectors carry the Bosch manufacturers' warranty. For more information regarding Bosch's warranty, please contact our offices at 1 (800) 961-92920
Interchangeable part number information, for your reference: