Trouble with heated steering wheel mod

[avy]

Ok so I added a heated steering wheel to my 2018 1500. Since the swap I have an air bag light. Took it to the dealership and so far they have replaced the driver air bag and the module behind the pass rear seat. Neither resolved the issue. GM thinks that the replacement module was bad also. So it's scheduled to go in for another. I don't think thats the problem. Any ideas on what is wrong ?  Dealership isn't aware the heated wheel isn't stock but I cant see how that would affect the air bag

[DominatorZ71]

Let the dealer do their job and stop doubting them. 

[hollywoodsle]

Probably be a good idea to let them know it was added.  Because once they figure out it was, which they will, and have wasted time trying to fix something that isn't supposed to be there, it's going to cost you money.