Where is the computer on an 06 Chevy Silverado 1500 4.3L?

[ChevyOwner4054]

My truck has messed up again, it doing the same thing as before with not starting at all but will turn over. It was a wire from the ignition to the computer so I am going to check that. I have changed my battery, MAF sensor, plugs, wires, distributor rotor, distributor cap, camshaft sensor, IAC sensor, ignition control module, ignition coil, my cats, and my fuel pump. I NEED HELP.

[GasHog369]

on my 5.3 it was under the hood behind the battery , or to the right of the engine facing the truck

[ChevyOwner4054]

How big is it?

[muddkatt]

don't remember exactly, but a guess would be 8 x 8 X 2.

[rjgti]

mine is at the end of the cable that plugs into it

[dkjbama]

With all the money you've spent throwing parts at it, paying for a diagnosis from a professional seems pretty cheap right now. As a buddy once told me: "sometimes you gotta back off ten and punt."

 

On the bright side, at least you have an almost completely new ignition system.

 

The only other thing I can think of would be the coded key theft deterrent system if your truck has it. Have you switched to using a newly cut key recently? If so, it must be coded to the truck or it won't start.

[redvett]

Get the codes read first.

[ChevyOwner4054]

So all computer problems have been fixed, it was the connectors to the ignition coil and ignition control module. Now I think I have a blown gasket. The codes read P0174 (System too lean) Bank 2 and P0171 (System too lean) Bank 1. Fuel pump and pressure is good and I have no in-line fuel filter.