You need to remove the vacuum Brake Booster check valve from the booster to switch the power Brake Booster vacuum check valve and hose. Then unscrew the hose clamp at the check valve and free the hose from the valve. After removing the Intake Manifold follow necessary replacement operations for ly2, ly6, lc9, lmg, ly5, l76, and other specific rpo models. Remove the vacuum Brake Booster hose from the engine connection before taking the part out of the vehicle. Connect the vacuum Brake Booster tube at the engine port and mount the vacuum Brake Booster check valve onto the hose using the clamping tool. Fix the vacuum Brake Booster check valve onto its final position within the vacuum Brake Booster.