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Does the HMi module in a 2015 Tahoe have any association to…

Customer Question
Does the HMi module...

Does the HMi module in a 2015 Tahoe have any association to the tps / Rke module and or keyless entry not working had to replace bcm due to water damage but before replacement remote start and door locks worked after bcm replacement keyless entry will not work and gave also replaced the tps rke module too and red lashed the bcm still not working

Mechanic's Assistant: Have you checked the fob's battery?

10-4 also the rear doors lock and unlock but not the front doors I’m thinking maybe faulty new bcm ?

Mechanic's Assistant: Are you fixing your Tahoe yourself? What have you tried so far?

Almost all electronics have been replaced, bcm hmi all seat components seat module under driver seat

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

The hmi module was bought used have not re flashed it yet

Submitted: 8 months ago.Category: Chevy
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Answered in 21 minutes by:
12/11/2017
Chevy Mechanic: Gabriel Grey, Auto Service Technician replied 8 months ago
Gabriel Grey
Gabriel Grey, Auto Service Technician
Category: Chevy
Satisfied Customers: 451
Experience: Master Service Technician
Verified

G​ood afternoon, I hope you are doing great. My name is***** am a GM technician and would be happy to assist you.

​It sounds to me like we do in fact have a faulty new bcm. The hmi module does not and can not affect remote entry operations, and if the bcm did not program correctly then none of the door locks would be working. Since the power distribution is all over the place that tells me it is a bcm fault, not at all uncommon on these, a couple months ago my dealer put 4 in one car before we finally got one that worked correctly

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Customer reply replied 8 months ago
Ok awesome this vehicle has been a pain was on water up to steering wheel so it has had all kind of fun obstacles
Chevy Mechanic: Gabriel Grey, Auto Service Technician replied 8 months ago

A​hh I have been there before, that can always get pretty interesting. Let me know if you have any further questions about any of it as you progress on the job :)

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Customer reply replied 8 months ago
Awesome thank you sir just didn’t wanna keep throwing parts at this one lol
Chevy Mechanic: Gabriel Grey, Auto Service Technician replied 8 months ago

I understand totally :)

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Customer reply replied 8 months ago
Ok so tried two new bcm front door locks still do not work and get an error message and software kicks out every time we try to communicate with the keyless entry module, everything else on Tahoe works and functions correctly except the two power locks on front doors and the key less entry ? ? ?
Chevy Mechanic: Gabriel Grey, Auto Service Technician replied 8 months ago

Ok I see. If everything is programmed and installed and the problem is still present then I think we are going to have a problem with the theft module. These have a separate module that controls theft features, and if this is not working properly it could affect individual door circuits because it will think the car is locked. The part is called the keyless entry module(remote control door lock receiver) and it is sold and available online

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Customer reply replied 8 months ago
Where is that module located ? If it’s behind passenger rear quarter panel it has been replaced also
Chevy Mechanic: Gabriel Grey, Auto Service Technician replied 8 months ago

I believe these are mounted in the driver's door panel, I am not 100% as I know they switched them on the newer models, I will check the workshop manual when I get to the shop tomorrow and double check

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Customer reply replied 8 months ago
Cool thank you sir, the module I replaced was the rke / tps receiver just under pass quarter glass
Chevy Mechanic: Gabriel Grey, Auto Service Technician replied 8 months ago

Okay good to know. I believe that is the transceiver/signal module

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Customer reply replied 8 months ago
Have you had a chance to check that workshop manual yet?
Chevy Mechanic: Gabriel Grey, Auto Service Technician replied 8 months ago

Yes I did, sorry for the delay, things got a little hectic here yesterday. These do list a separate door lock control module that is mounted in the driver's door, so that would be the next thing I would inspect/replace

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