I need to decide, do I want to install the GU6/G80 axle that I have, From 2000 Blazer into my 2002 Blazer or sell the axle

 

Sell it if you can find someone who values a Gov-Lock (Bomb). I personally have no use for a rear that locks all at once, but only after traction has been severely broken and one wheel spins fast enough to engage the Gov-lock.

 

The G80 will cost you some fuel mileage too... all the time.