Towing a 2016 GMC Acadia

[2000 DS]

I have learned that with the three by-pass fuse disconnects opened if you unlock the door using a method that is different from the way you locked the door (For example: you use the door button to lock the door then you use the key to unlock the door)the horn will sound and the lights do not function properly. The security system is designed to interpret this as someone attempting to steal the vehicle.

I installed a by pass switch in place of the horn fuse which I open when along with the other by pass switches.

I have not experience any problems since I made that change.

Remember to close the horn by pass switch AFTER you close the other three switches.

Take care, God Bless, George Hay

[Surmotor]

Thanks George I'll practice before next tow

[Dutch Star Don]

It's funny how each car has different issues. I have a 2016 GMC Canyon. The Canyon and it's sister the Colorado, require that the battery be completely disconnected. Since these are relatively new vehicles to the GM lineup, a lot of questions were asked as to why the battery needed to be disconnected. This causes issues with various aftermarket braking systems.

With little help from GM, it was determined that the biggest reason for the battery disconnect was to prevent the ELECTRIC steering from fighting the truck while being towed.

Sometimes you find that GM is just afraid of giving the real reasons for decisions because they're afraid people will circumvent the procedures.....which is probably true.

[Beyond]

It was easier to run the fuse for the 50amp to behind the license plate rather than to inside the vehicle. It works great that the last step is to turn off that switch after locking the car with the key fob like normal. The key we leave in the ACC position does not have a chip and cannot be used to start the car. So the alarm (horn) still works.

When going back into the car, we can flip the switch without needing to raise the hood, to use the tailgate or use the key fob to unlock the doors.

The switch is not visible. The one under the driver's seat isn't visible either. Both operate the same direction Up for driving and down for towing.

For normal driving with the front plate on, all the connections have some protection from sun and grit. We saw an Equinox this past summer with it all behind the plate, my thanks too that owner for the idea. And thanks to the folks that helped us understand why we had the horn blowing the first trip (before switches), so we could fix it.