Re: Clunk heard when letting on/off gas?
I am like you HummerJim, I think its the 6 speed as well. Comparing it to the old 4 speed with the 6.0 liter is a lot of difference. Due to me having both, it was hard for me to get use too. At first I didn't really like it because of all the shifting, but I will say as time goes on, I am liking the 6 speed more and more. The past 5 days, I have tacked on over 2,000 miles on my 2008 H2 and got 19 miles per gallon with it.
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To Stainless, I run Shell V-Power Premium in both of mine. Engine idles smoother, and dont downshift as much, plus you get better fuel economy.
2007 Hummer H2
2008 Hummer H2
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