Product Descriptions Fitment: Works on 2001~2004 GM Duramax 6.6L Engines Use IPGM-01 for 2001-2003 2004 with 8th digit of 1 in VIN IPGM-02 for 2004 with 8th digit of 2 in VIN Features: 1) Safely pulls the injectors from the cylinder heads without pulling the injector cups and without causing damage to the injector body. 2) Advanced heavy duty steel with black oxide finish, durability, impact and wear resistance, anti-corrosion and anti-rust. High precision and hardness to provide a much longer service life. 3) Replace OTC 6778 and Kent Moore J-44639. .