Hello and welcome to 2CarPros. While there's no specific information that sheds light on what's going on here, I'd mention that there are more than one fuse to check in this case. I'm including diagrams of the two interior fuse boxes (one is in the instrument panel/dash) and the other is under the back seat, on the passenger side (just pull up from under the seat, along the front edge and it will pop right out).
Looking at the first image below, check the fuses for IGN 1, IGN 3, and HTD SEAT/INST PANEL. I don't *think* that these ones will be the issue, but it only takes a second to check them. Looking at the second image, check fuses I/P 1 and I/P 2. Looking at the third image, check RADIO, IGN 1, IGN 3, AUX PWR, and C/LTR (sometimes GM puts other things on this circuit along with the lighter).
So start there and see what you see. Either way, let me know what you find and I'll go from there. If this doesn't solve the problem, I'll be able to look deeper into it and see if there's something else that could be connecting the two things. Thanks for using 2CarPros. And good luck!
Harry
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Sunday, March 31st, 2019 AT 4:47 AM