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Username Post: BCM swap 2015 Express        (Topic#360223)
rockfangd 
"7th Year" Gold Supporting Member
Posts: 2872
rockfangd
Age: 34
Loc: Utica ny
Reg: 04-13-10
03-20-20 07:50 PM - Post#2789086    

Hi All.
I swapped the BCM in a 2015 Chevrolet Express.
Everything works good but I cannot get the airbag light to go out.
It has to do with the code in the SDM not matching the code in the BCM.
Does anyone know if the number can be reset without replacing or resetting the SDM?
And if not does anyone know who could possibly reset the SDM.
It only has 1 airbag in the steering wheel as it is a cutaway.
Thanks all

Old School GM fan FOREVER


 
Shepherd 
Frequent Contributor
Posts: 2011

Loc: Lake George, NY
Reg: 11-11-15
03-21-20 05:57 AM - Post#2789101    
    In response to rockfangd

Have you scanned the sirs system to see if there is a code? Could be wrong but I believe the bcm does not control the sirs. Should have lots of time as we are basically locked down, can't even get a take out breakfast here.



 
rockfangd 
"7th Year" Gold Supporting Member
Posts: 2872
rockfangd
Age: 34
Loc: Utica ny
Reg: 04-13-10
03-21-20 08:59 AM - Post#2789125    
    In response to Shepherd

So the SDM and BCM are paired to each other.
If you swap either with a used one it will conflict.
The code is caused by the confliction.
I need to be able to reset one of the modules so it will learn the code from the other module.


Old School GM fan FOREVER


 
rockfangd 
"7th Year" Gold Supporting Member
Posts: 2872
rockfangd
Age: 34
Loc: Utica ny
Reg: 04-13-10
03-30-20 01:23 PM - Post#2789821    
    In response to rockfangd

Ok so this morning I swapped the donor bcm back in so I could post the code.
It is the one and only problem with the swap.
The code simply states no communication with the Airbag module.
There is no communication because the primary key sent by the airbag module does not match the one in the Donor bcm.
The code from my Airbag module is 8065.

Old School GM fan FOREVER


 
65_Impala 
Very Senior Member
Posts: 4440

Reg: 12-29-02
03-30-20 06:52 PM - Post#2789851    
    In response to rockfangd

They do get matched but i don't know how with a used module. i know the new ones pair themselves but I've read it's a 1-time thing.



 
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