Installed a black grill from eBay. Good fit and finish similar to factory grill on RST and comes ready for front camera. Easy swap and huge improvement over the stock High Country grill. Next up is blacking out the silver lower bumper trim front & rear and then decide on some black rims...
Assuming you have electric trailer brakes you will need to add a brake controller.
https://www.tahoeyukonforum.com/threads/2023-chevy-tahoe-aftermarket-brake-controller.139331/
I did mine in my driveway and it took about 2-3 hours and a few beers.
Sounds fantastic and I love the looks from guys with Corvettes, Mustangs, Camaros, etc that wish there car sounded half as good as my Tahoe. :)
With all the electronics in these trucks I would first try disconnecting the battery for 15 minutes and see if it cures itself. Often the electronics in newer vehicles seem to need to reset/reboot.
You should be able to add in a relay for them. Tap the back up reverse wire in the taillight harness to act as the switch and use power from the 12volt hot lead in the trailer harness.
The pickups have the same plugs but slightly different wiring. At one point I tried a harness for adding a led light bar to the back which would do running lights, brake, blinker and reverse lights and the lead which would be for reverse was a blinker.
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