Put a MityVac on the bleeder nipple and use it to draw the fluid down to the caliper. If you don't have a MityVac, use a syringe (available at feed store). If that doesn't work, try pushing the fluid from the caliper to the master cylinder with either the MityVac or syringe. The 2 piston caliper used since 2000 are sometimes hard to get pumped up.