how to change 2wd to 4wd on 2001 chevy blazer v6
Find a doner 4X4 Blazer for parts, (front dif', transfer case, drive shafts, linkage, etc.) Shop around you might find a wrecked one out there. 4X4 shops will convert it for you too. I have a Jeep friend who did same conversion to a his 2X Cherokee.
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