How to tow your Bolt EV behind a motorhome:
You have to use a tow dolly with electric brakes, which means you need an electric brake controller for the dolly's braking system. Figure on adding about 12 feet in length to your RV. Having an assistant with all of this helps greatly. You drive the Bolt onto the dolly and secure the wheels with the supplied towing straps. Inside the vehicle, you sit in the driver seat and turn on the power, then make sure that the the transmission is in Park (not Neutral!) and the electric parking brake (EPB), which locks the rear wheels, is off. If you are not sure, activate the EBP and then deactivate it. You next turn off the power. Do not wrap the seat belt around the steering wheel. Locking the seatbelt will activate the EPB. Leave the steering wheel in straight ahead position and it does not need to be immobilized. Exit the vehicle. Do not leave the key fob in the car. Do not lock the vehicle or the EPB will activate. If you have an add-on tire pressure monitoring system for your RV, obtain screw-on tire sensors for the dolly and the Bolt's rear tires (using a TPMS is highly recommended). You might need to purchase a range extender for the TPS monitor to reach that distance. Prior to getting under way, have someone look at the rear tires on the Bolt to make sure they are turning as you drive a foot or so. Any time you lock the vehicle, you will have to repeat this procedure. You should stop somewhere safe after driving a mile or so to tighten up the tire straps and when stopping to fuel or at rest stops. No matter how tight you initially made the tire straps, they WILL need re-tightening. You do not need to disconnect the 12V battery. That will not help anything and, in particular, it will NOT deactivate the EPB. If the EPB is on, the rear tires will drag. You might not notice that when driving the RV. You cannot see the rear tires moving in your RV's backup monitor. You can see the left rear tire moving in the side mirror when making a 90 degree left turn, more difficult when doing a right turn.
One other suggestion for driving any vehicle onto a dolly: The first time getting the vehicle on the dolly, the fear is driving to far and over the front of the dolly ramp. I've done it with a VW Passat. Since the Bolt is a front wheel drive vehicle, you now have a real problem! Anyhow, let's assume you've successfully gotten the vehicle onto the dolly. Place a magnetic mount CB antenna on the metal part of the dolly with the antenna touching the vehicle's front bumper. Obtain some narrow tubing, about 2 feet is adequate, to place over the end of the antenna so that you can see it while sitting in the driver's seat. If you place one of those big, black, paper clips on the end of the antenna, it will keep the tubing from sliding down the antenna. Mark the position of the magnetic mount on the dolly using a Sharpie. The next time you drive the vehicle onto the dolly, first place the CB antenna on the dolly using the marks you made and when you drive the vehicle onto the dolly and hit the antenna, you've driven far enough!