Forum Discussion

trailertraveler's avatar
Jan 05, 2018

GM onstar car connect questions

We just got a Silverado with the GM hotspot. I have connected to it from the trailer using my Ubiquiti Nanostation connected to either the laptop or a Wifi Ranger Go2 and then two laptops connected to the Go2 by Ethernet. The speed was better than what I generally see with my Verizon phone tethered to the Go2.

On my Silverado, with the key out of the ignition, if I push the on button on the radio, the internet connection/Wifi will come on along with the radio. I can mute the radio, but have not figured how to turn it off and leave the internet/Wifi on. Is this possible? I also am not sure how long it will stay on as the longest I have tried so far is about 20 minutes.

The hot wire in the GM 7 pin connector stays hot when the ignition is off. I have read several discussions about trailers drawing down the tow vehicle battery if the trailer is left connected when not plugged into shore power. I am wondering if the reverse would be true that the trailer's charger would keep the tow vehicle battery charged when plugged into shore power while using the hotspot? I am aware of the issues involved with the tow vehicle charging the trailer batteries while underway that are related to wire size and length of run. I have no idea how much the hotspot draws.

Any comments and experiences would be greatly appreciated.
  • sheltieRV wrote:
    I have been using this for about a year on my 16 silverado.

    1. Battery (gasser) will run down after a few hours. I now put a trickle charger on it when I know I won't be driving for a few days (we are 3 months at winter location and I only drive about once a week). The trickle charger cannot keep up with the discharge rate, so I am still limited to a few hours (a movie) before giving the charger time to catch up.

    2. I manually turn off the headlights (rotate dial counter clockwise all the way), as I found that the system will turn the headlights on if it gets darker and thus run the battery down even more.

    3. I also keep a velcro tag on my RV door to remind me that the hub is on.

    4. The silverado will start beeping at you when the battery gets low, get tuned into a chime ding and turn off when it happens (the first time I heard this I thought it was my neighbor and not me).

    It is a bit of a PITA, but the price, bandwidth, and speed is worth the PITA when RVing.


    yes, it is a nice feature. We have verizon for our phones and then the GM hotspot is ATT. So...... between the two if there is a chance of internet, we get it.

    Now if there was just a way to have only the hotspot on and program how long that would be nice. Usually we can get done what we want in the 15 minutes or so the hotspot stays active with the key out of the ignition, so that works for us, but would be nice to have that be longer.
  • sheltieRV wrote:
    ...Battery (gasser) will run down after a few hours. I now put a trickle charger on it...The trickle charger cannot keep up with the discharge rate, so I am still limited to a few hours (a movie) before giving the charger time to catch up...
    Thanks!

    I'll have to play with having the trailer connected while on shore or generator power and see how that does. I'll also try connecting the suitcase solar panels to the truck. However, even if the solar panels can keep up, we mostly use internet at night so they won't help all that often.
  • Hi!
    I bought an additional deep cycle battery for my van, it works all weekend, 2 days long uninterrupted for GSM and WiFi.
    It was ACDelco with 95 AH capacity.

    We left our children at home, so we took a powerful battery with a big capacity to be always in touch.
    Nobody called us or disturbed us. But the thought that we were in touch just gave us peace of mind! )