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www.elcovaforums.com > ... > General H3 Discussion
Sep 15, 2005 - 24 posts - 17 authors
rattling sound inespected in my hummer because ... go uphill or press on the gas pedal to ... same time up to 2500 rpm on my H3. .... Buzz or Rattle Noise While DrivingUnder Load from the Exhaust ... 2006 Hummer H3
I don't have a shop manual for a Hummer. But GM trucks built in 2007 use something other than the alternator to control voltage. Sometimes its called a generator control module and sometimes it is inside the body computer or the ECM. You may need to check with someone who specializes in Hummers for the answer.
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