Every now and then I browse Manheim to see what's crossing the auction block.

This may be one of the more interesting cars I've seen so far.

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I haven't seen a single 2015 Sierra on the road, yet this one has already clocked over 100k!

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It's being sold by GM - perhaps it was running on a 24/7 belt to test endurance?

There's a near-identical one being sold by GM as well with 83K.