Swapping to 6.2 w/ 8speed after warranty

[henrypbui]

I am thinking I want to swap my 2014 CCRB(crew cab regular bed) 5.3 to the 6.2 8 Speed after my warranty is up. Does anybody know how this would go with all the electronic computers in the truck? Can they be reprogrammed to work with the 6.2 and 8speed, or do i need to get their respective ecm and trans controller for it to work? And will the 5.3 engine harness be compatible, or does the 6.3 use a completely different harness and different sensors? Plug and play also?

 

I figured by the time my extended warranty is over, the 6.2 and 8speed should be fairly cheap by then. I may not beable to get as good of a deal on a new truck if it is the same body style, and if it is, I highly doubt there would be enough change for me to want it. And my resale value probably wouldn't be much either.

[RyanbabZ71]

are you talking about a handheld tuner? Autocal? What do you use on your 5.3 that you want to use on a 6.2?

[redwngr]

Why not just get a 2015?

[DanMan_S]

I am thinking I want to swap my 2014 CCRB(crew cab regular bed) 5.3 to the 6.2 8 Speed after my warranty is up. Does anybody know how this would go with all the electronic computers in the truck? Can they be reprogrammed to work with the 6.2 and 8speed, or do i need to get their respective ecm and trans controller for it to work? And will the 5.3 engine harness be compatible, or does the 6.3 use a completely different harness and different sensors? Plug and play also?

 

I figured by the time my extended warranty is over, the 6.2 and 8speed should be fairly cheap by then. I may not beable to get as good of a deal on a new truck if it is the same body style, and if it is, I highly doubt there would be enough change for me to want it. And my resale value probably wouldn't be much either.

 

 

The problem you'll run into is that the 6 speed vs 8 speed wiring harnesses will probably be quite different. I saw the same thing happen when the 6 speeds came out, and the 4 speed to 6 speed swap wasn't exactly plug and play. You effectively needed a custom wiring harness done up. In the end, it was better just to get the truck with the transmission you wanted, and then swap the engine if you wanted to go up in displacement.

[SouthernSilveradoGuy85]

The block is the same and I'm sure the 8 speed would bolt right up. So your problem will be all of the wiring, mainly for the 8 speed. Honestly with the cost and work you'd have to do and it may still not be just right, you might as well sell the '14 and just buy a '15. Sure the 6.2 is better, but it's just a bigger bore with the same stroke and everything else so you might as well just bore the 5.3 block up to a 6.2 if you're still going to do the work.

[KARNUT]

If you going for performance and it's not wore out, E85 gets you within 40HP and TQ. The you add headers and a custom tun. The transmission look up gear vendors that would give you more than 8 speeds.

 

 

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[MNDaveC]

This seems like it would only make sense if your truck is fully paid-off, has been extremely personalized making resale problematic, and you have no intent of ever selling the vehicle... a hobby thing... doing for hell of it...

... otherwise it defies logic

[blackout07]

I'd just gear it and add some go fast parts to include a super charger. Cheaper, easier and would blow a stock 6.2 off the road.

[henrypbui]

I wanted to wait for the 2015 6.2 but had to get a truck now, and got a hell of a deal on mine for $38,000 pretty much fully loaded with the exception of a sunroof and 6.2 for the SLT. The 6.2s that were available were slim to none and were either over priced, or didn't have what I wanted. It seems like I would have to special order what I wanted and I don't intend on paying MSRP on the truck. Knowing how it will be 4-5 years where my truck will probably be paid off, and depending on resale, it may be worthwhile to actually do the swap after that, depending on the price of the transmission and engine itself.

 

I am fairly new to GM vehicles with all the new technology in them. I didn't know if the control units are programmable to beable to swap engines or transmissions or it would need its actual control units for the respective part.

 

Are the heads the same and the block is the only difference is the bore?

 

And for the transmission, I know it is fairly new to everybody, maybe somebody would know more about that transmission. And the torque rating is much stronger than our 6speed is the main reason why I want to do that in the future, unless it is financially better to just trade the truck in.

[TJay74]

This will be custom all the way. Between the engine and transmission you will also need to find out what harness change you will need, harness alone for the engine and transmission could easily be $1k-3k just for the harness. Then you will need the ECM and TCM and the ability to program them with your VIN and the factory calibration for of the computers, which by the way GM will not help you with as far as the dealers go. Too much liability to GM and the dealer if something goes wrong.

 

So unless someone in the aftermarket steps up I cant see you getting this to work. The ECM can be programmed with 3rd party software, the TCM is where I think you will have the hurdle to jump over.

[Mikeb52r]

I think you will spend way too much time and money to get this project to work, you would simply be better off trading into what you want. Too bad you couldn't get what you wanted in the first place.

[Isriam]

i don't get this whole "6.2 was overpriced" i hear people say. there is a factory cost, and a msrp markup. outside of that, you know how much it costs to buy the same trim with a 5.3 vs 6.2 so any markup is going to be the dealer, or different trim options.

 

sell your 2014 and get a 2015. resale will be higher in the long run and you'll only be out a couple grand at the most. what you're asking to do will a) kill resale and b) cost more.

[KARNUT]

i don't get this whole "6.2 was overpriced" i hear people say. there is a factory cost, and a msrp markup. outside of that, you know how much it costs to buy the same trim with a 5.3 vs 6.2 so any markup is going to be the dealer, or different trim options.

 

sell your 2014 and get a 2015. resale will be higher in the long run and you'll only be out a couple grand at the most. what you're asking to do will a) kill resale and b) cost more.

Its not the engine that's over priced, its a good value. Its the package you have to buy to get it is for some people. Im one of those, I got every thing I wanted in the Texas package, out the door for 32K. I didn't want to pay the 12 to 15K more for stuff I didn't want to get the 6.2.

[Isriam]

Its not the engine that's over priced, its a good value. Its the package you have to buy to get it is for some people. Im one of those, I got every thing I wanted in the Texas package, out the door for 32K. I didn't want to pay the 12 to 15K more for stuff I didn't want to get the 6.2.

 

so the trim provided what you wanted, not the engine size ;) texas edition is a great deal if you want to stay in something like SLE/LT price range.

[DanMan_S]

 

so the trim provided what you wanted, not the engine size ;) texas edition is a great deal if you want to stay in something like SLE/LT price range.

 

That's my biggest problem with GM right now. I don't want to go with a SLT/LTZ this time, I'd prefer a SLE with heated cloth seats but I really want the 6.2L with the tow package. C'mon GM, just stick the engine I want in the model I want and take my money already!