What did you do to your NBS GMT800 Tahoe/Yukon Today?

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Rocket Man

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Do you still recommend these? Looking at new plug wires and your suggestion is the only one that pops up when I search.
I do. Just make sure you have the round type of coils in the description so they’re the right length. They’re especially good if you have headers.
 

Keviebear86

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Depends on what you’re willing to spend, the ease of installation desired, and if you’re 4WD/AWD or 2WD. I went with ARH on mine because it’s AWD, their stuff mounted easily and bolted up to the stock exhaust and it’s high quality. I went with their bullet high flow cats. There’s no actual y- pipe on mine, it runs duals all the way to the muffler which is a 2 inlet single outlet. They were about $1800 iirc.

Well it looks like I've got something to save my pennies for. I am willing to spend the extra money on my vehicle since I intend on keeping it for a very long time. I'm not looking to modify the Tahoe to the point that it can't be used for my daily driver/tow vehicle (I'm a fisherman). Plus working for a repair shop I have priced OE parts (manifolds, converters, etc.) and its close to the same price. Thanks for the advice, I'll keep updates as I get them.
 

iddqd

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The crankshaft seal was starting to show its age and developed a wet spot. Got it knocked out this weekend. I also installed a new harmonic balancer and new belts since I was already there.
Don't forget to perofrm a crankshaft variation re-learn in PCM. It is required every time you remove the balancer (unless you marked it and installedd in the same position).
 

Rocket Man

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Don't forget to perofrm a crankshaft variation re-learn in PCM. It is required every time you remove the balancer (unless you marked it and installedd in the same position).
I know the SM states to do that but I didn’t, I forgot about it. Do you know what issues this could cause? Either way, I guess I’ll do it but it’s been a couple years and I haven’t noticed any issues.
 

ivin74

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Don't forget to perofrm a crankshaft variation re-learn in PCM. It is required every time you remove the balancer (unless you marked it and installedd in the same position).
I was under the impression that it had to be done when the crankshaft sensor was replaced. First time I hear it needs to done when the harmonic balancer is replaced. I do have the Tech 2 to get it done
 

Rocket Man

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I was under the impression that it had to be done when the crankshaft sensor was replaced. First time I hear it needs to done when the harmonic balancer is replaced. I do have the Tech 2 to get it done
I used to think so too, then one time I heard it needs to be done when the balancer is R&R’d and I promptly forgot about doing it. It had already been a year or more since I did the original work. It does state to do it in the manual, which I use alldatadiy for. I have also heard the PCM will do it automatically after a certain amount of mileage but haven’t been able to confirm.
 

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