The SP Tools Injector Puller Kit, No. 16400, is designed to remove diesel injectors from 2011 to 2016 GM vehicles equipped with the LML Duramax engine. Over time and with many miles, the injectors become heavily coated with carbon between the tip and cylinder head, causing them to stick together. When using a factory tool, it rocks the injector and causes binding into the head. This may cause damage to the costly injector. The 16400 Duramax Injector Puller lifts the injector 3/4" straight out without rocking the part. This significantly reduces the possibility of damaging the fuel injector or cylinder head and saves valuable time for the technician.