  Extensions of the standard model with universal extra dimensions are
interesting both as phenomenological templates as well as model-building
fertile ground. For instance, they are one the prototypes for theories
exhibiting compressed spectra, leading to difficult searches at the LHC since
the decay products of new states are soft and immersed in a large standard
model background. Here we study the phenomenology at the LHC of theories with
two universal extra dimensions. We obtain the current bound by using the
production of second level excitations of electroweak gauge bosons decaying to
a pair of leptons and study the reach of the LHC Run~II in this channel. We
also introduce a new channel originating in higher dimensional operators and
resulting in the single production of a second level quark excitation. Its
subsequent decay into a hard jet and lepton pair resonance would allow the
identification of a more model-specific process, unlike the more generic vector
resonance signal. We show that the sensitivity of this channel to the
compactification scale is very similar to the one obtained using the vector
resonance.
