Ok I have a CA 01 f250 7.3 and it has thrown 2 codes one for the #6 glow plug and one for the Glow plug controller. So I read the forum in the library and my question is, will the glow plug alone throw both codes, and I have the part number for the glow plugs but all I can find in here is GPR-109 for the relay. Does anyone know the part number for the controller on the CA trucks?