I had a 2021 Silverado 3500 HD with the snow plow prep / camper package (VYU). There was a wiring harness zip tied up under the rear of the bed on the driver’s side available (intentionally) for connecting a cabover camper wiring harness to.
Fast forward a year, I now have a 2022 Silverado 3500 HD (long story), but not only with the snow plow prep / camper package (VYU), but also with the gooseneck / 5th wheel package (CMT). The later comes with the 7 wire receptacle in the bed (intended for gooseneck/5th wheel hookups) which of course makes sense. However, the loose wiring harness under the bed for the camper prep is nowhere to be found so far as I have been able to tell. Yes, one could utilize the in bed 7 wire port/receptacle, but this is not desirable for at least three reasons.
1) there just isn’t the physical space. Yes, tonight I did it as I’m leaving tomorrow and needed something, but it involved removing the entire housing from the 7 wire plug leaving only the physical connections exposed and then using a nonconductive probe to push the remaining part of the plug (with no housing) into the receptacle as far as I could. It seems loose and I expect it to fall out. The wires have just enough space assuming the camper doesn’t shift.
2) this doesn’t cleanly facilitate a means to hook up a battery isolator which I’d much prefer to do. Granted, I could still do this but now I have wires going multiple places. I also don’t want to use the 12v power connection in the trailing plug as I’d prefer to run a larger gauge wire direct from the battery to my isolator to my camper receptacle to the camper.
3) utilizing this receptacle, the truck thinks that there is a trailer connected (I also have the advanced trailering option) and causes required interaction with the in cab HMI.
Yes, I can get it done and make it work enough for now, but this doesn’t seem to be optimal and wouldn’t think what GM/Chevy intended. Is there a wiring harness associated with VYU I’m not finding that can be used for the camper or did they really intend for me to utilize one of the “trailering” ports (essentially CMT) which just seems really odd and uncool?
I’m sure I could find an adapter from eTrailer to split one of the trailing connections under the bed for use with a cabover camper and my camper harness/plug/receptacle, but again, the truck will think this is a trailer, which is incorrect.