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Just so I understand, you want to drive to the dealer and then remove the tune? I'm assuming if you have the EGR removed, you likely have the DPF gone as well. Your biggest issue isn't going to be the CEL's from the EGR or limp, it's going to be from the DPF sensors all becoming active again.... and the truck will only start one time!
Stock tuning on a 6.4 with the EGR physically removed will start and throw CEL's, and eventually go into limp.
Stock tuning on a 6.4 with the DPF removed, the truck will only start one time, go into security mode, and NOT restart until the dpf has been replaced, all sensors have been plugged in, and the certain steps are taken to get the ECM unlocked.