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Hi I want to change my 2005 Silverado 5.3,4wd,4l65e to DBC.
I know I need a different PCM.
Along with harness changes.
I was told to use a # #12581565 PCM with O/S #12579405.
Is there a 4wd O/S...

Heres a link to EFI Connection.
They make what you need.

https://www.eficonnection.com/home/category/engine-hardware/crank-and-cam-signal-kits/efi-24x-product-line

That's a dead battery shortly.
It should be fairly easy to find.
The ECM draws a very low current.
I have never had to check a ECM for a current draw.It is always something else drawing.
I last...

What is your current draw in Milliamps?
With and with out the ECM in the circuit?

Do a search for P0200.
Follow the flow chart.

Most APP/TPS mismatches are cause by the wrong APP or TAC being used together.
On Gen 3 the APP(pedal) and TAC module must be from the same type and year of vehicle.
You cannot mix truck and...

What DTC settings did you change?
Can you post that tune?
I`m interested in the codes and their cause.

It may be controlled by the BCM,the BCM monitors the voltage and tells the ECM to change the output of the alt.
This info is for a 2012 vette.

What code is in it?
What is the alt from?

I would enable the LTFT. Set enable temp to 130*.
Set the PE /EQ ratio to 1.17 which would be slightly richer than you currently are.12.75-12.5.
Retest and post the log.
It looks rich, but without...

Make sure you have spark and compression on the cyl that misses.
Use an HEI spark tester,like a ST125. AC and KD make them.
Check the wiring on the coil both at the coil and the harness plug....

Good point, why waste the two minutes it takes to look at the cam gear with a light?

His B2 S1 O2 is stuck lean around 350-400mv.
It is adding fuel trying to richen it up.
Probably due to the dead cylinders on B2.With that much slop in the dist/cam gears it will fire the wrong...

Here are the schematics for the o2s. 02 6.0 used 2 different wiring diaghams

https://gsi.ext.gm.com/gsi/showDoc.do?docSyskey=770062&from=sm
...

Check the distributor gear on the cam.It is also worn.
Check all the plugs.
Replace the plugs that are fouled.2,8?
Fouled plugs screw up the fuel trims due to unburnt fuel.
See if the oil smells...

You should put the tune in the repository.

The reason you degree a cam is due to the possibility of the of the actual cam lobes position being wrong ,even with the timing marks aligned on the gears.
As stated, the timing gears, chain,...

Did you degree the cam when it was installed?
GM retards the cam timing on almost all the factory cams.This is done for emissions.
The LS-9 cam is made with a 1* retard (pin location),the LS-7 cam...

I don`t think a 1 bolt.1 pole gear will ever be made.
There is no need for it.
The cams made for a 1 bolt are for VVT,DOD,AFM.
As stated are for 58 x 4 gears.
I don`t think the lingenfelter box...

Check for correct wiring at the ALDL plug.

Does it actually miss? Or is it just setting the code?
If you can feel it missing, then you need to see if it loses spark, fuel or compression.
Post the tune and a log of it missing.
Check the...

Check pin "C" (blk/wht) at MAF for GND.
Also check pins "24,27,64,67" at PCM "C1" for GND.
The MAF and O2 sensors share the same GND.
Make sure that the MAP connector/line is not leaking.

Check the freeze frame and failure records.
They are available until the code is cleared.

The PCM detects that the difference between the actual airflow (MAF) and the Speed Density calculated air...

Did you ask support for help?

Any ENG/TRANS codes?