  We investigate the possibility of constraining Chaplygin dark energy models
with current Integrated Sachs Wolfe effect data. In the case of a flat universe
we found that generalized Chaplygin gas models must have an energy density such
that $\Omega_c >0.55$ and an equation of state $w <-0.6$ at 95% c.l.. We also
investigate the recently proposed Silent Chaplygin models, constraining
$\Omega_c >0.55$ and $w <-0.65$ at 95% c.l.. Better measurements of the CMB-LSS
correlation will be possible with the next generation of deep redshift surveys.
This will provide independent and complementary constraints on unified dark
energy models such as the Chaplygin gas.
