GMT 900 Trucks General Discussion 2007 - 2013 Trucks | General Discussion

Started 6l80 tranny swap today

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Old 06-17-2016 | 09:56 PM
  #31  
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Nope. Just loaded the tune and fired the truck right up.
Old 06-17-2016 | 10:01 PM
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Interesting..... I am surprised you dont have a vin mismatch with the tcm having a different vin loaded into it....
Old 06-17-2016 | 10:32 PM
  #33  
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Man this is freaking awesome!!! Great job to get this accomplished!
Old 06-17-2016 | 10:39 PM
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I don't know why it worked but it did, but I just loaded the TCM OS straight from GM SPS thru a mongoose pro cable. I can walk you thru the steps, since it was pretty easy once I got the software comfrigured on my tablet. I learned one thing the dealers do make a killing when they charge you for programming.

If anyone is interested I will work on that parts lists tonight.
Old 06-17-2016 | 10:47 PM
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In regards to the VINs, I do remember reading somewhere that most things are plug and play with GM Lan. The various controller are really just looking for certain controllers in certain locations. Like I said I read that somewhere but couldn't tell you where.

I have a couple of ideas to get the tutd to work. My first one is to get a new bcm and program it with a really early 09 1500 that had a LY5 and MYC and see what happens. Between HP Tuners, Tis2Web and Tech2Web I might get it to work. I am open to any other ideas.
Old 06-18-2016 | 12:15 AM
  #36  
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Not sure bcm needs to be replaced..... So much as reflashed! I oulled part numbers on my yukon vs an 08 denali and they are same part number....
Old 06-18-2016 | 08:21 AM
  #37  
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Most gm techs can't reflash the bcm with a different OS and keep your vin. I'm sure there has to be a way to "rewrite" the bcm but change the vin back. Idk as i am not a "GM tech"

As for swapping the bcm idk if it'll throw security or not. So it would be a "try it and see" thing.


As for the sensor swaps...it would have been "cleaner" to just repin the harness using the pigtail plastics you needed vs a ton of splices. Did you use butt connectors or solder/marine wrap?


The 6spd is tricky to fine tune as it goes for a daily driver that most romp on.
Glad you know the swap knocked out
Old 06-18-2016 | 11:28 AM
  #38  
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Originally Posted by motohead911
In regards to the VINs, I do remember reading somewhere that most things are plug and play with GM Lan. The various controller are really just looking for certain controllers in certain locations. Like I said I read that somewhere but couldn't tell you where.

I have a couple of ideas to get the tutd to work. My first one is to get a new bcm and program it with a really early 09 1500 that had a LY5 and MYC and see what happens. Between HP Tuners, Tis2Web and Tech2Web I might get it to work. I am open to any other ideas.
Is your vats disabled in the ecm, through hptuners? I have access to sps, tis/tech2web and hptuners.... Cant wait to get started on mine!!!
Old 06-18-2016 | 04:07 PM
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To start I have not disabled the VATS. I started by using Tis2web to load the 2500 os into the tcm. I choose only to flash the tcm, not the ecm/tcm. So I had the original tune in my ecm and it was able to communicate with the new tcm. The only thing I need to change in the ecm was is the speedo section of HP Tuners. I had to change the VSS pulses from 40 to 36. As of right now I have the original cluster and shifter back in the truck. Tis2web would not let my reprogram my replacement cluster, so I am looking for a place to get it program. I will be ordering a shifter with 1/16 pins. I will also order a new BCM so I can play with it. I have been driving the truck and it runs good. Still have a little delay when going into reverse or drive. I have played with the tow/haul and it works, it down shifts aggressively.
Old 06-18-2016 | 04:39 PM
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Did you have to manually enter the vin for the tcm into tis2web/sps?


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