The vacuum for the A/C controls and the Door locks comes from the brake booster vacuum supply line. So does the vacuum for the transmission controls. THEY DO NOT COME through the same port off the supply line. For many reasons they can not be put together. The biggest reason is that the vacuum to the trans is dropped to zero at full throttle. That would play hell with the A/C and door locks if they were on the same line.
The point of this is that the lines to the door locks shouldn't be attached to the lines at the valve cover. Those are the EGR and trans control systems.
The supply line should come from the booster line and split to the A/C (green), Door Locks (yellow) and the shut-off system (brown). There are two yellow lines as one goes to the vacuum reservoir in the truck and the other goes to the drivers door master switch.