Unfortunately I don't have the ability to test the H3 in the Colorado Rockies with 6-7% grades, but I do know from driving a Jeep with a V6 through the mountains definitely lacks power; this power is needed like someone else posted, more on passing and grade climbs. I don't expect the H3 to be racing a Porsche!
Bill
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2007 Hummer H3 Luxury/Adventure - Slate Blue Metallic; OEM Rocker Panel rails
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