What did you do to your NNBS GMT900 Tahoe/Yukon Today?

[lowh07]

You thinkin' what I'm thinkin'?




You're putting a Gen III motor in your Gen IV truck???

Is that a bad idea?

 

[swathdiver]

Is that a bad idea?

Well, it's not a plug and play swap Dave. Originally, you could not get the older system to talk to the new system but I have read on the Performance Trucks forum that adapters are made for this now. I do not know what problems those new harnesses will solve and what else will be needed to make this a seamless operating system.

What year is your Tahoe?

 

[lowh07]

Well, it's not a plug and play swap Dave. Originally, you could not get the older system to talk to the new system but I have read on the Performance Trucks forum that adapters are made for this now. I do not know what problems those new harnesses will solve and what else will be needed to make this a seamless operating system.

What year is your Tahoe?

2007 (might technically be a 2006.5, it’s one of the firsts). I know people put LQ4s into anything and everything so I never thought of it being an issue. Was thinking I could/should maybe use the original harness. It’s going to be a learning experience and never expected it to be plug and play. I’ve never heard of a gen III in a gen IV being a dealbreaker

Also did I ever post my name here or something lol. I don’t see it on my profile, and I don’t care at all if anyone calls me Dave or David, just wondering Lol. Might be fb friends with some people on here too. If anyone wants to add me I’m David Ramsey and my profile pic is with Cleetus

 

[swathdiver]

2007 (might technically be a 2006.5, it’s one of the firsts). I know people put LQ4s into anything and everything so I never thought of it being an issue. Was thinking I could/should maybe use the original harness. It’s going to be a learning experience and never expected it to be plug and play. I’ve never heard of a gen III in a gen IV being a dealbreaker

Also did I ever post my name here or something lol. I don’t see it on my profile, and I don’t care at all if anyone calls me Dave or David, just wondering Lol. Might be fb friends with some people on here too. If anyone wants to add me I’m David Ramsey and my profile pic is with Cleetus

I'm viewing this on my PC and your name comes up. Gen III does not use Canbus architecture and their computers cannot talk to Gen IV computers. The Gen IIIs crankshaft has a 24 tooth reluctor which is not compatible with Gen IV computers which rely on a 58 tooth reluctor. You can swap cranks or reluctors nowadays I hear. Then there is the aforementioned harness that I was told about but do not remember reading about it.

Just spent 5 minutes googling, I'd rather run a 6.2 than the old LQ4 with all the work involved. Not even sure that 4L80 will work either.

I'm just the first to come along, these fellas have forgotten more than I'll ever know on this topic.

Where's Chris? @iamdub Where's Randy? @randeez

@91RS @Tonyrodz @fasteddy @1BADI5 @Scottydoggs @01ssreda4

 

[Fless]

I get to be all black face tomorrow...

Going to polish the combustion chambers, and do a little work on the sides.
Hoping it will loose 3-4 cc... lol


Watching loys of YouTube vids, luckily I'm already tooled up!

No pics of the black face, please, someone seeing it (out of context) will be offended. Not that I care if they are.

 

[wsteele]

No pics of the black face, please, someone seeing it (out of context) will be offended. Not that I care if they are.

Yes, Just Fishing's chances at that Supreme Court nomination would be toast.

 

[08z71bgm]

oh and incase anyone wanted to know, 799 heads have 64 cc combustion chambers.
I just confirmed it with my Cylinder head cc kit.

Those are what’s on the gen4 5.3

 

[08z71bgm]

i need to try another calculator, but it says i'm @ 11.36 static compression if i run everything as is....

What is your dynamic?

 

[08z71bgm]

Does anyone know a website that has the cfm of many if not all factory radiator fan assemblies?

 

[Just Fishing]

What is your dynamic?

Too high!

I'm going to lower the static down to what a 6.2 truck has...
Damn, i wish i did more thought into this build

I need pistons with little 4cc valve reliefs in them.


If i went with a sloppy quench i would be ok, but i want a tight quench!!