HeliMark

Some of the earlier '16s had everything but the actual software in the radio. I had to take mine to the dealer about a month after i got it, and have them put it on (free). Case of radio ready, but not the software. Mark Sent from my SM-G930U using Tapatalk

Do a google search for service bulletins for your truck. I am not sure if the duallies are having the same problem, but a number of the last couple of years Dmax's have had steering problems. Look at the thread about the 2016 steering. I know yours is a 2015, but just a thought. Mark

The whole purpose of using dielectric grease is that it is non conductive. This is a simple way of protecting contacts from shorting out due to moisture in an enclosed environment. If the trailer plug on the truck didn't leak, one wouldn't have to do it. The brake test was something completely different. Mark Sent from my SM-G930U using Tapatalk

The plugs on the newer trucks seem to be a weak point. Clean and pack with the dielectric grease is a good suggestion no matter where you are located. And wholly crap, do not pull the trailer emergency brake to test it when you are hooked up to the truck. Want to talk about sending the truck into an electrical tissy...... Mark

Unless the truck senses a trailer is actually hooked up, you will not get any brake voltage at the plug. I have had some issue's and usually cleaning the plug has fixed it. Or in a rush, plugging/unplugging several times works. Mark

I have 18K on my '16 and so far so good. About 12K towing 9K if that makes any difference. Had the locktite SB done last summer on one of the free oil changes. If they haven't done anything by now, I doubt they will unless they are "forced". Mark

If you have the digital assist on the truck (I know all Dmax have it), that is normal. Here is the Chevy promo on it. "Tailored for Tow/Haul: A truck loaded with cargo or pulling a large, heavy trailer handles much differently than an empty truck because of the added weight. A steering wheel that normally feels light and easy to turn may require greater effort once the truck is laden. Sierra’s Digital Steering Assist solves that: When the driver pushes the Tow/Haul switch -- which also adjusts transmission tuning -- Digital Steering Assist responds by increasing low-speed assist and reducing static steering effort another 10%." Mark Edit: Believe the RPO code is NV8

This sounds a lot like mine. And I am thinking this is the Digital steering assist, at least on mine. At highway speeds, the steering is "vague" and likes to wander around. It is not much, but it is there. I think it is the steering assist trying to "assist" you with the crosswinds and the crown of the road. Of course none of that is staying consistent, so you are correcting for the road, and what it thinks needs to be done. When I am towing (10K pounds), it is better, but that correcting the corrections drives me nuts. If there was a way to disable mine, I would. Bet a lot of the steering woes would go away. Mark

I would do not use the dielectric grease on the front part of the plug, although when the contacts scrap during the connection, they should displace the grease. Due to the water intrusion I was getting, after all the connections in the rear of the plug were done, it was filled with the dielectric grease and closed up. Should not have any more water issue's, and I just make sure when I am plugging in, that it is dry and clean. Otherwise towel and/or contact cleaner, and some sand paper. As far as the stabilitrac, if it is a true failure of the system, the truck is suppose to go into the limp mode. With my "service stabilitrac" notifications, it hasn't gone into the limp mode. I sometimes think that when I get some of the notifications, the truck throws a couple more in just for fun... Mark

Yeah, welcome to the litigious world.... With America leading the charge... Some ****wad gets into an accident, which was absolutely his/her fault, but because the vehicle they were driving had some kind of safety system (which could not overcome the laws of physics and stupidity), and the person's ego could not accept that they are not Mario Andretti, they blame the vehicle and sue. Of course part of it is a money grab on top of it. Hence disable the car to avoid the lawsuit... Mark

I live in sunny SoCal, so the first time I took the truck to the dealer, they said there was water in the plug, Never figured that one out. I have seen the "service stabilitrac" one more time when I started the truck, and it went away almost immediately. Nothing since. I towed my buddies car hauler also since the last fix with no issues. Next time I will be able to get my trailer out will be in March. I would have the dealer replace the whole plug (apparently there is two parts of the plug), and make sure they cram every nook and cranny of it in dielectric grease, and keep your fingers crossed. These new trucks are extremely sensitive to any stray voltage. Remember, if the dealer computer says it is okay, then it is. Mark

Thanks, I have been paying close attention to the plugs, cleaning them prior to any trips to try and eliminate them as the problem. The dealer has replaced the whole plug assembly on the truck due to "weird" readings though. Last week I took the trailer out and put about 600 miles on it. Everything worked without any messages, so with all that has been done, maybe I have seen the end of this problem, but I will not bet on it. Unfortunately due to some commitments, I will not be able to take it out again until March/April. Mark

It does feel like the trailer brakes do work, but the manual slide switch (ITBC) will not work after getting the message which makes me question if the system is working. Personally could care less if the stabilitrak or abs system goes out (would be fixed), but for that error taking out the trailer brakes also is stupid. Should be an independent system that can be isolated in that event. Book says that if there is a failure of the stabilitrak or abs in the truck, the trailer brakes could be partially or completely disabled. The message that they display should inform you if you have a complete trailer brake failure or partial. At least one would know at that point. Kinda important pulling a heavy load at 70 mph. Glad these engineers don't work in the aviation industry. Rant over. Mark

I have a '16 2500 DMax. Been pulling a 10K pound toyhauler ('16 Forest River Stealth), but the every so often, I get a "service stabilitrac/trailer brakes/abs" warnings. First time was after towing for about 600 miles, was able to get it to reset, than again after towing 3K miles, 800 miles, and so on. No real rhythm. Of course when the "service trailer brakes" comes on, I lose the trailer brakes, which has not been a big problem getting it off the road after that, but lucky I have not had an emergency while they were inop. Everything will reset after pulling the trailer plug, doing a dance, plugging and pulling the plug again and another dance and drive about 50'. So far on the first one, the dealer replaced half of the trailer plug on the truck saying they found water in it. The other times, one dealer (mid trip) said I had a bad ABS module, but could not repair it at the time, and that the truck had codes for all the wheel sensors/abs/tranny and a couple of others. When I got home, the dealer here found one of the front calipers sticking, which had caused a warped disc. They ended up replacing the caliper and disc, regrind the other front disc and all new brake pads. They also found some unusual readings in the trailer plug, and ended up replacing the whole plug this time. They said the ABS was good. After all that, I had to tow my trailer to a dealer for a warranty repair on the refer. After driving about 10 miles, all the warnings went off, losing the trailer brakes again. The refer had a bad thermo disc and thermo wire (both 12v), and when I pulled it home after the repair, no warnings. So, here is my question. Could the bad thermo wire in the trailer cause some wonky voltage to backfeed to the truck, and cause the truck to go nuts? With all the new electronics, I know any abnormality can cause issue's. Now that I have the trailer repaired, I have an appointment set up to see the dealer with the trailer hooked up and see if the computers can find anything. Mark

My '16 2500 is in for some warranty work. Thanks to this thread, I called the dealer and mentioned the tsb. He said even though I haven't had the problem, they will do the fix for me. Mark