Tank,
Here is my favorite argument for these meatheads. The Suburban frame is arguably the most time tested and most dependable anywhere. GM has been making heavy duty trucks for a very long time so the fact that they chopped up that frame and modified it is no surprise to me. I am glad they used a HD frame that has been used on trails for heavy towing and more.
As far as the 6.0 liter engine goes I think it's awesome but don't take my opinion. The vortec was rated one of the 10 best engines for 03 (the version placed in the trailblazers) but it's the same setup (on a much bigger more powerful scale) as our rigs. GM/Chevy knows how to make an engine and of course they would pull the time tested engine from the shelf, modify it a bit for off-road use and stick it in the H2.
Using parts that are proven was a very smart decision on GM's part. I would be really concerned had they developed all new parts for the H2 and used us as guinea pigs. Fortunately we have located very few problems. One is a potentially weak tie rod that most people I have talked to agree will not break until under very extreme conditions, however, it could be beefed up. The air suspension is great but sometimes goes out. They have modified the bags for 04. I am sure there are other little things but for the most part that is it. A truly incredible machine made with time tested parts and engine that will only get better.
Make no mistake about it: THE Hummer IS THE ONLY READY TO GO OFF ROAD VEHICLE ANYWHERE. No mods are necessary and you can get most anywhere!
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