Hi. I just bought an Isuzu TrooperII with rear disc brakes. the truck stops fine but the e-brake will not hold on even a slight slope. In neutral I cant push the truck so i figure that they just need adjustment any ideas on how that can be done?

You could try a few things. First get in the vehicle and apply the brakes, then pump the E-brake pedal a few times. This is how you adjust them on the old F bodies. Second, take a look at the rear pads they could just be worn.