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Please, I need help.
2004chevy 6.4 diesel.
truck when is in motion, stared surges. Accelarats on it's own. change gas pedal sensor and did not fixe the problem.
6.4? I think you're confused. If it is in fact an 04 Dmax it's a 6.6 LLY just so you know. Check the injector harness for wear/shorts. Check fuel filter, etc. Start with the small things.