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04 GMC Sierra (RSS)
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I have an 04 Sierra with a 4.8 liter 115000 miles. A couple of weeks ago it started idling rough, and since then I have changed plugs and added a couple of injector cleaner treatments (Lucas). It is still idling rough, especially with the A/C on but i haven't notice any signifcant decrease in gas mileage. I have always had regular routine ...
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My check engine light came on and I wnt to Auto Zone to get them to run a scan on it so could try to fix it. The connector link did not have any power.I also tried my son's '02 Silverado and it didn't hae any power to run the scanner. Can somebody tell me what to check out to solve this problem?