  This paper reports a study on the truncated Israel-Stewart formalism for bulk
viscosity using the extended holographic Ricci dark energy (EHRDE), where the
density of dark energy is given as a combination of the Hubble parameter and
its derivative. The equations of motion are integrated and the resulting model
is analysed under many aspects, including the state finder parameters and the
generalised thermodynamics second law. Under the consideration that the
universe is dominated by EHRDE the evolution equation for the bulk viscous
pressure $\Pi$ in the framework of the truncated Israel-Stewart theory has been
taken as $\tau \dot{\Pi}+\Pi=-3\xi H$, where $\tau$ is the relaxation time and
$\xi$ is the bulk viscosity coefficient. Considering effective pressure as a
sum of thermodynamic pressure of EHRDE and bulk viscous pressure it has been
observed that under the influence of bulk viscosity the EoS parameter $w_{DE}$
is behaving like phantom i.e. $w_{DE}\leq -1$. It has been observed that the
magnitude of the effective pressure $p_{eff}=p+\Pi$ is decaying with time. We
also investigated the case for a specific choice of scale factor namely
$a(t)=(t-t_0)^{\frac{\beta}{1-\alpha}}$. For this choice we have observed that
a transition from quintessence to phantom is possible for the equation of state
parameter. However, the $\Lambda$CDM phase is not attainable by the statefinder
trajectories for this choice. Finally it has been observed that in both of the
cases the generalized second law of thermodynamics is valid for the viscous
EHRDE dominated universe enveloped by the apparent horizon.
