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Message: [QUOTE="psduser1, post: 468874, member: 735"] Alright, electrical gurus... 2003 excursion, has gearhead tunes, intake, 4" exhaust, a new fuel pump with pre and post pump filter (with stock bowl still in place), and a newish hpop, in other words, basic mods. I had a wheel bearing assy go out, changed that and the pressure line on the hydoboost. Now I have an emissions light on the dash. I know its some random info, but that's literally all that been done to this truck. I have checked the grounds, they look good. Any ideas? I don't have ae or any scan tools available here, mostly looking for a place to start! Thanks in advance. [/QUOTE]

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