I traded my 2011 Tahoe in last year for a 2022 Sierra 1500 LTD X-31. We were able to flat tow the Tahoe behind our motorhome without really doing anything to the vehicle itself, which we did for multiple trips and thousands of miles. Bought the Sierra primarily so we could put the golf cart in the bed on occasion.
My question is has anyone set a new Sierra up to flat tow?
The base plate is the easy part. Not sure about the rear light wiring. I had a diode setup with the Tahoe and it worked well. I just don't know if the Sierra lights are as simple as the Tahoe was. Next, GM says you have to disconnect the negative side of the battery. I figured I could just get a marine or some other type of switch to disconnect. The positive side terminal has a crazy connection, but the negative side has a weird terminal connection as well. Once the car power is disconnected I'll still have to have a dedicated 12v running from the battery to a cigarette lighter style connector in the cab to power the aux. brake.
Lastly, (I think) I've only tried putting the transfer case into neutral once. My 03 Silverado, and the Tahoe were very simple. This thing involves the emergency brake and a sequence of button presses on the 4WD switching, dancing on one foot, tuning around, and an apparent sacrifice to the gods to get the Transfer case switched. Then a similar dance to get it back into gear when you're done. All in sequence as it needs to be done before disconnecting the battery.
Oh yeah, I guess you have to use the little emergency key to lock and unlock the door since there's no power??
Thanks to anyone who has info and has done it. I'm hoping it's not as complicated as it seems to be.