Amen to Circuitguy's comments. Call or write Hummer if you can't get dealer to help. This kind of knock should not be accepted as status quo.
Tell 'em you want a different H2. Mine has never exhibited any noticeable knock.
Jim
Red H2
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Jim
2003 H2 Metallic Red (now gone)
2008 H3 Graphite Lux
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