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2015 Big Horn with 92k miles. The CEL came on while my wife was driving. She says a message came up briefly that included the word 'throttle'. My guess is the Service Electronic Throttle Control message. So I pulled the EGR tube to clean it off for the first time. In the process, I spotted some...

I've had the GDE Tune for 10,000 miles. I installed the new ECU at about 45,000, and my truck just rolled over 55,000. Like nearly every other GDE tuned truck, I experienced all of the great benefits: turbo lag virtually gone, increased MPG, and the EGR shutoff. However, in the last few weeks...