  We study the Z boson pair production at LHC in the Randall-Sundrum scenario
with the Goldberger-Wise stabilization mechanism. It is shown that
comprehensive account of the Kaluza-Klein graviton and radion effects is
crucial to probe the model: The KK graviton effects enhance the cross section
of $g g \to Z Z$ on the whole so that the resonance peak of the radion becomes
easy to detect, whereas the RS effects on the $q\bar{q} \to Z Z$ process are
rather insignificant. The $p_T$ and invariant-mass distributions are presented
to study the dependence of the RS model parameters. The production of
longitudinally polarized Z bosons, to which the SM contributions are
suppressed, is mainly due to KK gravitons and the radion, providing one of the
most robust methods to signal the RS effects. The $1 \sigma$ sensitivity bounds
on $(\Lambda_\pi, m_\phi)$ with $k/M_{\rm Pl} =0.1$ are also obtained such that
the effective weak scale $\Lambda_\pi$ of order 5 TeV can be experimentally
probed.
