2005 Silverado 5.3 swap

[tommymiller090106]

So I bought a 2005 5.3 out of a Silverado half ton with a 4l60e transmission got a good deal $1,500 130 thousand miles on it, my question is that on the stock intake manifold it has a return port to the fuel tank someone told me this was for vapors can I take this off, I have a Boyd thank with a 340 stealth pump in it any help would be appreciated thank you

[The Chainsaw]

There was a return style fuel rail on some of the truck manifolds. You would need to run that as a return back into your tank.

[tommymiller090106]

I guess what I don't understand is that the returns not on the fuel rail it's a port in the manifold

[68basket]

Originally Posted by tommymiller090106

I guess what I don't understand is that the returns not on the fuel rail it's a port in the manifold

Got a pic of it? most 2005 i have seen were a returnless fuel rail. Just realized you are probably talking about the purge valve. Yes this can be taken off and removed from the tune to stop a check engine light

[The Chainsaw]

Oops I misunderstood the question. Above comment is correct.

[tommymiller090106]

Alright so how do i plug that hole what can I use to plug it with and in is there a built in fuel regulator or do I need to still put one on the fuel line sorry about all the dumb questions but I'm really new to this and I guess I should tell you guys I'm building a 68 stepside I post a picture but I don't know how

[gottattooz]

The vapor return port is located on the top of the intake with a black plastic line clipped to it. You can unplug the sensor and remove the plastic line. With the sensor unplugged, it won't open, so there's no need to find a plug. Also, you can find a shop to delete the evap system as well as the O2 sensors behind the catalytic converters.

- Josh

[donandal]

As stated above, that line would be the purge line, that takes
the fumes from the gas tank ( thru the charcoal canister ) and
burns them.

It's part of the emissions system. You will need to decide if you
want to run without emissions. That decision will impact the method
of gas tank venting that you will need to use with your new tank.

[donandal]

The fuel rail lines are another separate issue.

If the fuel rail has a return line, that line takes the fuel supplied
to the engine that is in excess of what is required at that time for
producing the power you need, and returns the excess to the tank.

[gottattooz]

I swapped a 4.8l into my 68 and I used the factory fuel pump in an aftermarket fuel tank behind the rear axle. (i used the entire wiring harness from the donor vehicle).

I swapped a 5.3l/4l60e into my 65 Buick Skylark station wagon and I used an after market inline fuel pump with corvette fuel filter/regulator with two fuel return lines to the factory fuel tank. The factory fuel sender had a return line on it, but I had to add a second line. I used an aftermarket transmission pan drain plug and 1/8th not barbed fitting to a return hose from the intake fuel rail.

- Josh