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2001 Z71 Tahoe, axle ID?

1205 3
My brother just picked up a 2001 Tahoe Z71 and wants to do some maintenence. I've searched using all kinds of different wording and cant find anywhere that tells how to identify weather he has a 8.6, 9.5, 10.5, or 11.5 inch rear end.

Help anyone?

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Officially Tucking Tire
9,643 Posts
im pretty sure halftons came with an 8.6.
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