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Good suggestion, will do.

Thank you for responding!

Been trying to get this thing to run right, but i'm not so good on the engine side of things. I have bought an 06' sierra w/5.3 that was bored to 5.7 with Z06 cam. I copied over a Corvette engine,...

Hi all,
I have a 2006 Sierra 5.3 bored to a 5.7. Found some of my injectors were leaking and bought some 8.1 injectors after some recommendations.

I installed the 8.1 injectors, but I cannot get...

Ordered a set of the 42# 8.1 injectors with the same style plug but won't receive till next week. Also retuned the engine utilizing a stock 2002 Camaro 5.7 tune and it runs way better with fuel trims...

Thank you soooo much, will get bigger injectors and schedule a tune ASAP!!! This is probably why I have rattling at higher RMP.

Damn... oh well.

Hi 5FDP,
Thanks for responding, it is much appreciated. Dang!!! Oh well, guess I will get larger injectors and a tune. I will have to find out what size I have currently and go from there.
...

2006 GMC 5.3 bored to 5.7 with Z06 cam.

Bought truck as is and was told it was tuned. However, I am having hard starts when it sits for approximately 30 min and after logging, I found what looks...

SOLVED - PCM was bricked. I guess the computer does not like being tuned with an aftermarket stereo. I had to pull the stereo and amp fuses, then open the PCM, make a connection between one of the...

Hi 5FDP,
Just tried that, no work. Don't know where to go from here....

Good day,
I have a 2006 Sierra 5.3 Went to load a simple tune and the antitheft kicked on (car with lock light) and now I cannot start or connect to my truck. I have tuned this truck many times and...

Alvin, I sent you an email.

Also, almost every time I go to write, it fails to write and goes into reduce power mode. After a few attempts it will finally write. Is my ECM bad?

Hi all,
Back from vacation and got around to repining the 4L80 harness. I removed the white wire and moved the brown wire to the white wire's original location. However, this did not work and still...

Thanks Alvin,
I am using the 4L80 segment, but still won't lock up, only on command. Once back from vacation I will re-pin and see what happens.

I will have to look, not sure how to check this. Thanks for replying.

Well, I tried to segment swap back to a 4L60 and it did not like it at all. Felt like it didn't want to move so I didn't push it and put my other tune back on. I am unsure if I just need to change...

Hi RDF1, thank you for replying. So if I remove the swap harness, do I sill need the two VSS signals to the ECM?

Thaks for any input, just trying to correct what I jumped into.

Thank you for responding. So if I do not do the segment swap, do I sill change the Tranns Type to 4L80? Sounds like you are saying to change it back to 60E?

Thanks again for your help.

Hi all,
I recently purchased a 2006 Sierria 1500 that already had a swapped 4L80 that was not working. The 4L80 was swapped with the Michigan Motorsport swap harness and pins installed in the ECM....

Never mind, I see they do. Dang, another thing to buy.

Thanks 5FDP. I am guessing HP Tuners does not do wideband? I am still learning.

So, after making more adjustments to MAF I was able to bring everything down with a few hot spots for rich or lean. Can someone look and let me know if I am headed in the right direction?105682
...

I was able to bring them down a lot by adjusting MAF.

Will work on it more when I can.105582

Hi all,
2011 Silverado 5.3 with original 6 speed swapped into 86 C10.

I originally had it tuned by a "tuner" and was not satisfied. When it was tuned, I did have the original air intake with a...

Mostly turned out to be a bad wheel balance. I tried everything and finally went and had rode force balance and it took most of the shake out. Thanks again for your help.