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Premium Member
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435 Posts
Discussion Starter · #1 ·
Any idea what this box is? It's mounted next to the HMI on my car. My car has the 8" screen and no navigation.

When I google I come up with HMI control module bypass.

What in in the world is it for?

Mystery Box.jpg
 

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Super Moderator
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7,787 Posts
GM Part No.: 84216626

Module Asm-Hmi Control Module Bypass

FYI:

ASM -
Abnormal Situation Management

HMI - Human Machine Interface
Interesting: I wonder what purpose it serves?
 

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Premium Member
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435 Posts
Discussion Starter · #7 ·
After looking over schematics I do believe this is the Onstar module. I haven't pulled my glove box back out to add the light yet but when I do I will verify the connector vs schematics.
 
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