
I'd look for one with the 6L80. I dont have a tahoe, but I'm not overly impressed with my 5.3/4L60E, with 3.42s. Seems like it's either lugging, or wound up. I also drive more aggressively than most at times, so that may be part of it.
Likely because of your gearing. My Tahoe has 4.10's from the factory, works very well.
What year? After I bought mine I learned some of the 06 Z71s came with 4.10s, but they were very few compared the the 3.42 trucks. I haven't looked really closely into it, but was under the impression that with the 6 speed they kept the shitty axle gears, but had much better, and lower transmission gearing offsetting it.
looking at a 2010 Tahoe. Is there better years than others? Years to watch out for?
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I'm rocking an 09 Tahoe Hybrid right now as a DD. I absolutely love the truck. It's super comfy, quiet and has tons of power. 6.0L / 2 mode hybrid / 4wd. The truck has coils on all 4 corners with IFS up front and a multi link out back.

Does the hybrid feature add to the experience, or is it just extra dead weight?![]()