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Thank you for the reply, i was kinda hoping that over the last few years they may have come up with a os code patch to get this to work without having to licence another ecm.

Hello, I just swapped a tkx into my ls swap, I am using a ecm operating system 12617631 and have the trans set to manual, I have the speed sensor wired directly to the ecm lins 71 and 72, my...

Does anyone know what commands the ecu to start to use the egr spark advance table? Is it just when the ecu sees a certain voltage on the 5v signal from the egr position sensor?

I pulled the injectors and got them tested, 4 of the injectors failed, even the new ones i bought, the injectors are less than a year old, it turns out the pins in the injector are loose and must...

I did swap injectors a couple of times, to different cylinders but the problem stayed. The engine isnt showing a misfire i just noticed it was a bit lean after the first start after installing the...

Well after more troubleshooting i am still having this problem, but now it is injector #1 that is having the problem and injector #3 is working. I have tried new ground wires on the PCM and grounded...

Hello i am having a problem with my ls swap in my 67c10, I have had the swap for a few years now and just noticed this problem. I felt a miss while cruising after swaping to some new fuel rails, once...

I have a 2006 lq4 swapped into my 67 c10, I do not have a/c in this truck. I recently wired my wideband into the a/c pressure sensor to log my afr's. My problem is now my fans are turning on or...

I installed a turbo onto my LQ4, it has a log manifold and i have the drivers o2 sensor in the drivers side manifold and the passenger in the the down pipe of the turbo, i have changed the injector...

I just did a ls swap into a 1967 c10, i have a electronic speedo that i need to calibrate, i just have to press a calibration button and drive a kilometer then hit the calibration button again. ...

I just got a dual electric fan setup for my ls swap, I added the wires to the ecu to control the fans when i reworked the harness. I see under the system tab there is a tab for fans. Do i just...

Just installed the software, i entered the serial number and application key, but no credits are showing up on the program, i created a customer account on your website and i am showing the 8...

Yeah i was thinking that was all it was, i just find it weird that it will stall twice and then start fine. And why would it be only certain vehicles that have this problem, and why has this...

Thanks for the reply, my truck is still stock for now, i am just wondering why this problem is coming up. i was thinking it has something to do with the CTS as it has only been happening when i...

So i am once again having a startup problem with my truck again, the problem now is the temps here have dropped to around -25 degrees celsius and if i plug the block heater for my truck in when i...

Just an update on this thread, I have been using petro ultra 94 or petro 91 fuel with no problems at all, truck has been running great. So i tried to go back to shell vpower 91 and the stumble...

The last time the truck was in they replaced the fuel rail and all the injectors, and that didn't change anything. And to try and prove that it wasn't the fuel injectors i bled all the pressure off...

So i filled up the truck at a petro-canada gas station with there ultra 94 and have started the truck twice now where it would have normally stumbled but it started like normal.

Ok so i tried to do some stuff with the fuel pressure to try and figure this out. once again this morning there was no fuel pressure and i started the truck and the stumble was there. so i left the...

I have tried my 2012 tahoe and that starts up no problem, the sierras stumble is not normal, half of the time it actually stalls out. it is worse when the ambient temps are warmer, as when it is...

well so far the maf and the throttle body has been changed, when they changed the throttle body they said it was fixed, i picked up the truck and immediately noticed a smoother idle. but the next...

LTFT were around 3% once the truck was up to temp, also the truck starts fine when it is colder out as it will hit the high idle and stay there. on another forum someone had a similar problem and he...

The dealer has no idea what is making the truck stumble. they have started to change parts, They changed the MAF sensor with no change. so now they are calling gm technical for help

Wow, that must be it, hopefully they can get this sorted out and i can get my truck back.

what PID's should i log that would help?

I just did a quick look under the truck to see if i could see where it was leaking from and it is from the front cam cover, you can actually see the...