Where do I check Manifold Vacuum on the 3.4???

I always checked Vacuum by the EVAP Canister on my old camaro. Never knew where to check Manifold Vacuum

Do I require any special fittings? I have a Vaccum/Fuel Pump Test Kit (which I can't use the fuel pump part on fuel injection )

 

Any help out there?

Only vacuum lines I see are metal and I don't know how to put my guage up to those

 

u can pull a signal from the fitting on the very back of the manifold, its a T one side goes to the brakes.

 

Thanks, I will try that and see what I get!