99 K2500 CCSB LY6 swap

I had been looking for a clean truck and found this one in California back in Oct 2013. So I flew out from Michigan and drove it back. Love the truck, but it just needs some more power to keep me happy.

Finally pulled the trigger and sold the 5.7 from my truck. I got $950 for it and should be picking up my 09 ly6 this next week from my local truck salvage. 138k, complete with harness, ecm, gas pedal and y pipe for $1450. I hope that's a pretty fair deal. I've already bought my flywheel, adapter and bolts. I got the dimensions online for a 1" setback motor mount adapter and had a buddy cut some out for me.

This should be a good swap. Does your truck have the 4i80e? Welcome. Pics?

Yep, it's a 4l80e. I will get pic post soon.

Hi and welcome to the site. Lots of guys here can answer most if not all questions you may have about your swap. Keep us informed and don't forget the pics. Good luck!!!

Thanks for the welcome guys. Since this will be my first swap I am sure that I will have plenty of questions for you all. What's your thoughts on any inspections/preventative maintenance for the engine prior to installing it? I not sure if I should replace head gaskets or not. I will be sure to take pics as I go along also.

Those wheels look good on the truck. What year model did they come off of?

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Originally Posted by Chevy-Art

Those wheels look good on the truck. What year model did they come off of?

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They are oem GM 07-10. I wanted factory rims but not the standard aluminum. I really like the look myself.

It is a good look.

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Originally Posted by gmech68

What's your thoughts on any inspections/preventative maintenance for the engine prior to installing it? I not sure if I should replace head gaskets or not. I will be sure to take pics as I go along also.

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I wouldn't worry about the head gaskets. I would definitely change the rear main seal, oil pan, valve cover, intake and valley gaskets.

The only thing I did with my engine was the rear main seal. Now it has come back to bite me in the a**. I should have done the pan and valley/intake gaskets as well since both the pan and valley have begun to seep since the swap.

Thanks John, I appreciate the input.

So to be able to use the ly6 I will need to do something about it being a 58x reluctor vs a 24x. Has anyone overcome this obstacle yet?

You can do this:
http://www.lingenfelter.com/mm5/merc...3#.VQdUveH-YT4

^yep that's the same thing I used

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Originally Posted by Chevy-Art

You can do this:
http://www.lingenfelter.com/mm5/merc...3#.VQdUveH-YT4

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Thanks, and here I thought it would just be a "normal" swap.

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Originally Posted by chvy=power

^yep that's the same thing I used

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Will I be able to use the ECM that comes with the ly6? At this point I am in need of a lot of help. I have been trying to do my homework, but i must be missing something.

So what I have found out so far is that, to use the ly6 PCM (E38) I will need a tcm (T42) to run my 4l80e. But this PCM will not work with my factory gauges.
Or I can use Lingenfelters 58x to 24x convertor with say a 0411 ECM. ?? But would have to use dbw and disable vvt. Does this sound right or am I off track here?

take the vvt off and throw it in the trash. Summit racing sells a vvt delete kit for a pretty good price.... http://www.summitracing.com/parts/cm...1z6xoCGBPw_wcB Use a 0411 PCM with the lingenfelter box and youll be good to go

do u have the motor mocked up yet? I plan on doing the exact same with the mounts..care to share the dimensions just to verify my dimensions will work?

I just picked up the engine on Friday. I cleaned it up and getting ready to remove 1 broken exhaust bolt. Also going to change out some gaskets while I have it out. I will let you know how my adapter plates work out when I get the engine dropped in. I got my dimensions online for them. What is your project?

Ok, so my motor mount adapters did not turn out as good as I would have liked, so I ordered some from ICT Billet. Has anyone used any of there products yet? Prices seem reasonable also. One thing I did find out after measuring both my old L31 5.7, and my LY6 is that the setback on the motor adapters is 1/2" and not 1". Does this make much of a difference when installing your engines?

I can't speak from experience on ICT products, but I ordered standard plates to use with my clamshell mounts. When it was said and done and had the trans mounted, the crossmember holes were 1" away from the mount on the trans. If the engine had come rearward 1", it would have worked like a charm. Had I ordered 1" setback plates, I would not have had any issues.

When you guys rework your wiring harness, do you cut out the wires you are not using or do you keep them for future use?

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Originally Posted by gmech68

When you guys rework your wiring harness, do you cut out the wires you are not using or do you keep them for future use?

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It depends what it is really. For example, I kept all of my rear O2 wiring in case I have to go back to an emission friendly setup. I also retained all of my A/C wiring even though I don't have a single component currently installed. I still plan on installing the A/C back on the vehicle after I've finished my swap and have had a chance to recoup some of the funds I took to get the swap finished. It's easier to just tie the wiring/connectors out of way for future use, than it is to cut your harness to pieces.

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Originally Posted by Blasphemy

It depends what it is really. For example, I kept all of my rear O2 wiring in case I have to go back to an emission friendly setup. I also retained all of my A/C wiring even though I don't have a single component currently installed. I still plan on installing the A/C back on the vehicle after I've finished my swap and have had a chance to recoup some of the funds I took to get the swap finished. It's easier to just tie the wiring/connectors out of way for future use, than it is to cut your harness to pieces.

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That makes a lot of sense on keeping the wiring for rear o2 sensors. I'm in Michigan and as of now we don't have any emission test yet.

I started reworking my 99 factory harness the other night. Do I have to use the gen4 sensors or can I reuse my obs temp, pressure and volt if I install the original sensors and alternator connected to the 99 ECM? Also what about the trans park neutral wiring. Does that need to communicate with the gen4 ECM/tcm? And........ One more question, the starter. 99 or 09 ECM? I guess that will do it for now. I know, damn Cherry boys! (first timers)

You may want to look into using an E67 ECM with a Trailblazer OS on it. The Trailblazers use the older style class 2 data and this wasn't changed when they started putting in the gen IV engines into them. I haven't actually done this myself, so I am speculating with what I've learned. But if you can get a 4L80E OS that will also work with the E67 operating system, I would think that you would be ok to run the newer engine, without needing the conversion box. You might even be able to get away with only using the E67 to control everything on the truck, but I'm not finding much out about that.

That would make things a lot easier and cheaper. I see where the guy with the s10/ly6/t56 did this. But I could not find ant definitive info.

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Originally Posted by gmech68

I started reworking my 99 factory harness the other night. Do I have to use the gen4 sensors or can I reuse my obs temp, pressure and volt if I install the original sensors and alternator connected to the 99 ECM? Also what about the trans park neutral wiring. Does that need to communicate with the gen4 ECM/tcm? And........ One more question, the starter. 99 or 09 ECM? I guess that will do it for now. I know, damn Cherry boys! (first timers)

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Anybody have a answer for this?

We'll back in mid June I finally got my truck up and running. The hardest part was finding wiring diagrams for the individual componants. I got a lot of help over on 67-72 chevy trucks website. Then finding out that my local library had Chiltons online. Finding this earlier would have saved me from a lot of headaches.
Just wanted to thank everyone here for all the help. I hope to be able to help others just the same.