TCM Location 2018 A8 Sierra?

[WS6FirebirdTA00]

I have not had much luck confirming the location of the 8 speed TCM for the 2018 Sierra.

 

Does anyone have any descriptions or pictures? I have seen a few older threads stating it may be in the transmission, hoping wherever it is access ins't a pain.

 

Thanks.

[tbarn]

Inside the trans.

[WS6FirebirdTA00]

Darn. Any info on how to get it out?

[Denali_King]

On the firewall. On the driver's side of the master cylinder. Very simple to remove.

[Denali_King]

If I get a minute I'll go take a pic of mine.

[WS6FirebirdTA00]

Awesome, thanks! I like that answer, not looking to tear into this thing that much lol

[BlkSS]

@Denali_King, I'd like to see a pic of the TCM you're referencing.  The last time I knew they were all inside the trans like @tbarn said.  They've been there since the 6-speeds.  They aren't serviceable separately to my knowledge.

[Denali_King]

Mine has been unlocked by hptuners and tuned.

[tbarn]

My bad. Shouldn't make assumptions. 6 speeds are in the trans. 8 speeds on the firewall

[Denali_King]

No problem

[WS6FirebirdTA00]

Thanks!

[Denali_King]

Hptuners is now offering new TCM's already unlocked for $400.  Beat the downtime and have your stock 1 unaltered.

[WS6FirebirdTA00]

Do you have a link to that? I don’t see it anywhere. I thought they only modified one you sent in.

[Denali_King]

https://www.hptuners.com/product/new-gm-unlocked-t87a-tcms/

 

Here you go.  

[WS6FirebirdTA00]

Thanks, not sure how I couldn’t find that searching though lol