I just replaced my flasher for one made for led. Works perfect and way easier. Picked it up at auto zone for like $15
That'll work on models up to 2007 I believe. The 6.4s and 6.7s are both controlled by the SJB/BCM. You can reprogram it to not do the fast flash for LEDs in the tail lights (for trucks with service beds and LEDs in them) but it doesn't work for the fronts
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