Hi,
Unfortunately, I don't see a direct replacement but that does not mean it cannot be done. I only see on the wiring diagram the radio input from the coax cable and the radio itself.
Normally, your biggest issue when doing this is, telling the control module that you have satellite now but from what it looks like the radio is that control module. Most likely you will need to get your sales codes updated so that the systems function but a dealer can do that very easily.
However, before you go down this route because OEMs do not make their products to just exchange parts, I would suggest investigating how to add it with an aftermarket component but keep your factory radio. There are many systems out there that allow you to add it and you don't have to worry about functionality or compatibility. Below is a company that is pretty well known for doing this.
Last, I would suggest just calling a couple dealer because if this is a plug and play option as it appears, they would know because they would do this all the time. In my current job I get constant calls from Chrysler dealers that think they can just plug in new radios and they cannot because those radios are options specific and even VIN specific these days.
FYI - The second link requires sales code IOB
Let me know what you find and I will be happy to work through any questions you have. Thanks
https://www.vaistech.com/satellite-radio-adapter-for-chevy-silverado-gmc-sierra/
https://www.infotainment.com/products/factory-gm-siriusxm-satellite-radio-kit-for-option-code-iob?variant=9459800506404&gclid=Cj0KCQjw5J_mBRDVARIsAGqGLZAeM1i3AHYu5nTnZPzQGK9q45oqzaJTPNO9BChFY2-Jks5Iog2EgYYaAmzcEALw_wcB
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Tuesday, April 30th, 2019 AT 5:42 PM