Engine vacuum diagram

Vacuum hose routing diagrams are shown on the emissions sticker under the hood. Look for that first because given all the options and engine size variables, there can be over a dozen diagrams for one car model, and it is real easy to look at the wrong one in the service manual. We know for sure the one under the hood is right. If your emissions sticker is missing, let me know and I will try to find the right one for a 5.3L.

Just looked at the vacuum hose diagrams, and realized your job is going to be pretty easy. There are not any! There is a hose that goes from the PCV valve in the rear valve cover, to the throttle body assembly, and that is it. There is a second diagram for the evaporative emissions related system, but that is tested by the car's engine computer for leaks. If there is a leak in that system, the check engine light would be on and there would be a diagnostic fault code set related to that system.

Hello,

Here are the vacuum diagrams for your car:

1 - EVAP Canister Purge Solenoid Valve
2 - EVAP Canister
3 - Fluid Level Vent Valve
4 - Vapor Recirculation tube
5 - Fuel Fill Neck and Fill Cap
6 - Fuel Tank
7 - EVAP Canister Vent Valve
8 - Vent Hose/Pipe
9 - EVAP Vapor tube
10 - EVAP Purge tube
11 - EVAP Service Port or Service Access Connector

Check out the diagrams (below). Please let us know if you need anything else to get the problem fixed.

Cheers, Ken