0449 code Check Engine Light
 

My truck is a 2007 Classic 2500 HD 6 L gas, the CEL has been on for a few months and it is the 0449 code. After lots of research, I changed the solenoid with one from a 2006 Suburban as directed but after 5 days it came back on.


The previous owner had the intake line fix rerouted above the transmission housing as per the service bulletin.


Just wondering if there was a step I missed or is there another option?


Thanks