LS1 engine hook ups.

I'm ready to hook up my harness and also want to confirm some hose hook ups.

Picture 1 is on the driver's side of the intake, a hose goes from here to where???

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Picture 2 is on the rear of the intake manifold, a hose goes from here to where?

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Picture 3, This hose goes to the front of the passenger side valve cover, where should it connect to?

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Many thanks.

#1 Evap canister for emissions = if you are using them. If not remove it and cap the vacuum port.

#2 Vacuum port for brake booster. cap with a good quality cap.

#3 I need to see where it's connected to. if it hooks on the valve cover, it's art of the PVC system.

Hey Mike, the tube up front goes into the throttle body or the LS intake. If you don't have emissions, just cap everything and use Autozone #PCV-1009 on one of the valve cover ports.

Thanks for your input guys.

I looked at a photo of my engine as received with a C5 Electric TB and see that the hose in pic 3 was connected to a port on the TB (see pic). My cable operated TB does not have this port.
Further research indicates that this is the "Fresh Air Line" input to the passenger side valve cover.

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I also tore apart the PCV line in Pic 2, here is the PC Valve in its grounding clip. New valve is a Purolator PV1063 (See pic)

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During my on-line research I read about LS1's having high oil consumption and fouling caused by oil mist being fed via the PCV back into the intake manifold.

One suggested solution is to install a catch can in the PCV line, another is to switch to the LS6 PCV system, but that requires a new valley cover. What experiences do the LS1 drivers have with oil consumption?

Mike,

No personal experience yet. But my reading turned up the '04+ LS6 valley cover and hose, no PCV required. Looks neat & tidy:

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Rich

Don't forget about the small vacuum port under the MAP sensor.