One way of checking the sway bar link is by jacking the vehicle up, remove the wheel, put a wood block under the control arm and jack it up until the sway bar link is unweighted. Then check for movement in the ends of the link. Movement may be caused by the joint wearing or a nut loosening up. In the case of my last check for noise (Passenger's side), a nut was loose.
2007 GC SXT - Magnesium - S&G - 3.8L - 173,000 kms
2002 GC Sport - Stone White - 3.3L - 358,500 kms
2003 Jeep TJ Sport - 4.0L - 279,000 kms