You may replace the bushings by pressing them out. GM would rather you not know this!!
we would need more information but most if not all bushings can be replaced
yes there are aftermarket solutions for this
It is what GM wants you to buy to repair the rear knuckle bushings, but they can be replaced by pressing them out
An LRU is a unit that can be replaced in the field.
Field Replaceable Units
The worn bushings can be pressed out and replaced. This is the most economical solution to worn bushings. After market replacement parts can't be ordered from any Auto Parts dealer. Read the discussion page for this question.
A CRU is a Customer Replaceable Unit. A FRU is a Field Replaceable Unit. A FRU needs to be replaced/repaired by a qualified field support person, while a CRU could be replaced by the user/customer.
No, the sensor will need replaced.
Your a arm bushings need replaced.
No
Center bearing should be replaceable after removing driveshaft
In the official Knuckles Chaotix, Sonic wasn't one of the characters, but there is a ROM hack of the game where Mighty the Armadillo was replaced with Sonic.