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Hey everyone. I have a 2004 Silverado 2500HD. 6.0 4L80 4X4. It came with a factory installed CNG fuel system. I do enjoy the lower price of fuel, but it is very inconvenient to find filling stations for CNG. Even if I find one, they don't all have the proper quick connector nozzles to fill my truck. I am nervous about traveling to far from know stations.
My question is can I switch to gasoline? I have found a donor truck that I can get the tank, pump, all the fuel lines and electrical from. I have another intake from an 04 LQ4 that I has the fuel rail and injectors that I can use.
My truck does have the fuel pump relay installed. I am hoping that if I install all the gasoline components and remove the CNG stuff that it will work.
Is this a bad idea? Any thoughts, criticism, advice would be appreciate.
Which intake system is on the truck now?
If it is a 6.0 you already have the injection manifold since GM never used anything else on the LS engines.
In fact it might just be the whole gasoline injection system with a CNG nozzle near the throttle body.
I'm sure the manifold is the same, the rail looks different. What I assume is the presser regulator is mounted on top of the driver coils. One line comes out and goes to the passenger another to the driver.
Is it an LNG injection setup? If so it might use a different injector/regulator/plumbing setup all together.
If you have a complete LQ4 intake setup, I would just switch the complete setup over.
The donor truck should have all you need. Just transfer over the whole manifold, etc as it would be easier moving complete assemblies than all the separate parts.
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CNG to gas conversion 
