Re: Spark plug confusion - 2007 H2
I've found now that GM dealerships give poor information on Hummers when you go to the service department for parts info. I used the 41-985 (12571164) plugs when I changed mine because that's what Lynch Hummer said I should use when I called their Hummer service department in 2010 for the information. As for coils and wires which I replaced last year, the local Chevy dealer here gave me the Chevy Suburban V8 2007 wires and coils.
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Hummer, like nothing else
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