Tuning file installation

[Tonyrodz]

Stock pump is good to about 450 HP so unless you're going with twin turbos you're fine. Superchargers will come with a pump as part of the kit if needed. Yours is a 2003 so there isn't a fuel filter under the driver seat inline is there?

Yes, that's where my filter is--around.

 

[Rocket Man]

Yes, that's where my filter is--around.

I thought on 03 they went inside the tank. Well @Sam Harris thats where you should start- see if you have an external fuel filter and if so, replace it.

 

[George B]

Fuel filter is on the frame under the driver floor. The fuel pressure regulator is in the rail on the left bank and could also be contributing.

 

[Dantheman1540]

That's a bummer fuel pumps are never the most fun thing to swap. There is a company that makes a full direct drop in bucket with upgraded pumps if you feel the need to do so.

The link is to the dodge version but they offer one for GM trucks and SUVs as well. This will be my choice when the time comes, but if you do forsee big power then I see no need.

https://m.facebook.com/story.php?story_fbid=3759780300730199&id=155752837799648

 

[Sam Harris]

I thought on 03 they went inside the tank. Well @Sam Harris thats where you should start- see if you have an external fuel filter and if so, replace it.

I do. This was replaced about 7k miles ago.

 

[Rocket Man]

I do. This was replaced about 7k miles ago.

I would still replace it and the FPR too since it’s under the hood like George said. Mine had an issue at one point and I was able to buy a rebuild kit but I don’t remember how I found that.

 

[George B]

@Sam Harris Is your truck a flex fuel?

 

[Sam Harris]

@Sam Harris Is your truck a flex fuel?

Yessir

 

[Sam Harris]

I would still replace it and the FPR too since it’s under the hood like George said. Mine had an issue at one point and I was able to buy a rebuild kit but I don’t remember how I found that.

That’s cool. Good to start with them i suppose, then do the pump if necessary. Looks like this is the one:


ACDelco 217-3073 GM Original Equipment Fuel Injection Pressure Regulator Kit with Clip and Snap Ring https://www.amazon.com/dp/B000NW4PXI/ref=cm_sw_r_cp_api_i_gEO3Eb4KZMPP2

 

[George B]

Yessir

So your fuel pressure will be around 42 PSI while idling and jump to 45 off idle.