2024 Brake controller Problems

bruceb58 · August 30

42 minutes ago, lineman1234 said:

( for those of you that love to trollllll, and argue about anything. ) This post isnt about arguing, just sharing what i have first hand information on the/my problem so far.

I am the one that said there was going to be a delta voltage and you come in and talk about delta being a completely different thing. Pot meet kettle mr troll.

brad bill · August 30

1 minute ago, bruceb58 said:

I am the one that said there was going to be a delta voltage and you come in and talk about delta being a completely different thing. Pot meet kettle mr troll.

Exactly...so non self aware!

If you are going to put in a diode, you might as well just disconnect it completely since that will do basically the same thing.

Edited August 30 by brad bill

UWSkier · August 30

Diode will drop the voltage a fraction, but who cares? This problem is because the onboard charging capability of the solar array is pushing the trailer potential above that of the truck. I don't need my truck charging my trailer. It charges itself just fine.

If you don't have solar or a generator increasing the voltage on the trailer side, you probably don't need the recall done because your brakes shouldn't ever glitch out.

brad bill · August 30

52 minutes ago, UWSkier said:

Diode will drop the voltage a fraction, but who cares? This problem is because the onboard charging capability of the solar array is pushing the trailer potential above that of the truck. I don't need my truck charging my trailer. It charges itself just fine.

If you don't have solar or a generator increasing the voltage on the trailer side, you probably don't need the recall done because your brakes shouldn't ever glitch out.

It will drop the voltage 0.7V...but since that basically kills any charging you will do anyway from the truck, just disconnect that wire from the trailer!

Mike Michaud · September 27

I had the brake module replaced on my 2024 Denali Ultimate and I continue to intermittently get the "Trailer Brakes Disabled - Service Required" message. No solar, but I do have 2 lithium batteries. GMC now says it's being caused by my HydraStar brake system. I never had this issue with my Ford truck. GMC is stating the issue is mine to resolve. This is not my camper causing this problem, it's the truck. I sent a letter to GMC asking for them to buy the truck back. I just want a safe and reliable truck! My next step is to sue. Anyone interested in joining a class action suit?

BuckWallace · September 27

11 minutes ago, Mike Michaud said:

I had the brake module replaced on my 2024 Denali Ultimate and I continue to intermittently get the "Trailer Brakes Disabled - Service Required" message. No solar, but I do have 2 lithium batteries. GMC now says it's being caused by my HydraStar brake system. I never had this issue with my Ford truck. GMC is stating the issue is mine to resolve. This is not my camper causing this problem, it's the truck. I sent a letter to GMC asking for them to buy the truck back. I just want a safe and reliable truck! My next step is to sue. Anyone interested in joining a class action suit?

Good luck with the class action. But for real, it's BS that GM is saying it's our fault. The first time I brought my truck in for this last year they tried to say it was my trailer, but I had zero issues with my old truck. I also hooked my trailer up to two of my buddies' trucks and had no issues, so it's definitely this new controller.

lineman1234 · September 28

Its still interesting some have problems, some dont, some still have problems after the recall or part being replaced, some it fixed there problem. Some do a diode install on the camper and it fixes the problem. I havent read anything on the/a diode install not doing away with the problem. So far.

((( i know a diode, isnt the best fix and it should be good from the start, but if it helps people its something till the right fix is found. ))) Or the cause at least.

Niclas · October 7

I bought a 2024 Silverado 2500HD Gas 6.6L and trying to tow a 2018 Bison Horse trailer living quarters without a solar charger and Brake system will not work as well. it's been at the dealership all summer, keep getting the run around, got the updated module, software update etc. and them saying there's nothing wrong with my break controller. Although, I got the trailer company to re-do all my brake system, changed wiring, plug etc. after 3000$ on the trailer brake system and hooking it up to 12 different trucks that aren't 2024 chevy proving the trailer brakes to work. GM basically saying the trailer is not compatible to the truck and I should have done my research, therefore there's nothing they can do and I'm on my own. offered 150$ visa card for the inconvenience. Now what? 100K truck that can't safely pull my 100k trailer?

Edited October 7 by Niclas

Niclas · October 7

On 9/27/2024 at 6:35 PM, Mike Michaud said:

I had the brake module replaced on my 2024 Denali Ultimate and I continue to intermittently get the "Trailer Brakes Disabled - Service Required" message. No solar, but I do have 2 lithium batteries. GMC now says it's being caused by my HydraStar brake system. I never had this issue with my Ford truck. GMC is stating the issue is mine to resolve. This is not my camper causing this problem, it's the truck. I sent a letter to GMC asking for them to buy the truck back. I just want a safe and reliable truck! My next step is to sue. Anyone interested in joining a class action suit?

I agree with you on this, I am getting the same from my dealership. if theres anything we can do to push this im in.

lineman1234 · October 22

I can update on mine... First time towing since i installed the one way diode. It does work as well as lets currant flow just fine to keep the camper batts up wile towing and using power. I leave all the normal dc stuff on for travel and have a ac/dc freezer in the outside kitchen that gets plugged into the dc port for travel.

Gator4836 · October 24

My dealer has installed the new module and I still have the same problem even with my ATV trailer and it doesn't have a solar panel or battery, other than the break a way small battery. Happens on old trailer and new trailers.

Dealer says my trailers are not compatible with the new brake system, Bull!

Chadw90 · November 9

On 10/23/2024 at 7:18 PM, Gator4836 said:

My dealer has installed the new module and I still have the same problem even with my ATV trailer and it doesn't have a solar panel or battery, other than the break a way small battery. Happens on old trailer and new trailers.

Dealer says my trailers are not compatible with the new brake system, Bull!

Same here. Installed the diode on my big enclosed trailer, works great. But have the issue on my small trailer. I can install a diode here too but this isnt the solution. I often pull different trailers for work. I cant be installing diodes in every trailer. After a couple months of observing, my trailer brakes work as expected for the first little bit. It is until the trailer battery gets fully charged from the truck that it is causing an issue backfeeding to the truck. Can go from having aggressive lock up braking at gain 6 to just a slight hardly noticeable drag on gain 10.
im thinking about an extension cable and dissecting it and installing a diode in it. Then my diode would be in the cable that i can use on every trailer.
Ultimately there needs to be a diode on the truck side.

bruceb58 · November 9

13 hours ago, Chadw90 said:

Same here. Installed the diode on my big enclosed trailer, works great. But have the issue on my small trailer. I can install a diode here too but this isnt the solution. I often pull different trailers for work. I cant be installing diodes in every trailer. After a couple months of observing, my trailer brakes work as expected for the first little bit. It is until the trailer battery gets fully charged from the truck that it is causing an issue backfeeding to the truck. Can go from having aggressive lock up braking at gain 6 to just a slight hardly noticeable drag on gain 10.
im thinking about an extension cable and dissecting it and installing a diode in it. Then my diode would be in the cable that i can use on every trailer.
Ultimately there needs to be a diode on the truck side.

A diode drop is typically 0.7V. You severely reduce the battery charge to the trailer by doing this if that is your goal to charge the batteries. DC to DC converter in your trailer solves the issue but you really need to bypass the 7 pin when using one. I have 3 trailers. 2 of which have DC to DC converters and one is a boat trailer that only has an EOH brake system(no charging). I have NONE of these issues that people have. Maybe it's because my GMC Denali was manufactured early 2024!

Edited November 9 by bruceb58

Chadw90 · November 10

6 hours ago, bruceb58 said:

A diode drop is typically 0.7V. You severely reduce the battery charge to the trailer by doing this if that is your goal to charge the batteries. DC to DC converter in your trailer solves the issue but you really need to bypass the 7 pin when using one. I have 3 trailers. 2 of which have DC to DC converters and one is a boat trailer that only has an EOH brake system(no charging). I have NONE of these issues that people have. Maybe it's because my GMC Denali was manufactured early 2024!

Ya i get what you’re meaning here. My big trailer, i have a truck end plug wired to a solar panel to keep the batteries topped up while its parked, so my brake fault is immediate when i hook up. My small enclosed has a trailer brake battery maintainer, my truck runs at 14ish volts when driving, so 13.3 with a diode in line, still enough to trickle charge that little battery. Brakes work great when i first hook up and within 15mins, they are weak. It mimics brake fade. I unplugged the battery today and they worked 100% all day.

All other trailers that i tow for work, i dont care if they get a rapid charge or not. I could tow work trailers 5 times a week and it be different trailers each time. We just grab one out of the new line up and toss a dealer plate on it.
this is where i plan to get a 3’ extension cable and put a diode in line, just for those trailer that I dont own.
what DC to DC converter did you use. Id put one on each of my personal trailers.

bruceb58 · November 10

48 minutes ago, Chadw90 said:

what DC to DC converter did you use. Id put one on each of my personal trailers.

Victron Orion 12/12 50 XS.

https://shop.pkys.com/xs-12-12-50?srsltid=AfmBOorTzwXqfNm3kyllOe0vp89Urx6LKZ6S89IxXvCpMXVnN0edCTdH

I also have a 120A Anderson connector on the back of the truck with a mating cord on the trailer. My trailer has EOH brakes so I just run the brake pump/controller off the trailer battery bank which is 560AH lithium.

the 120A Anderson connector is in that housing to the right of the receiver.

Edited November 10 by bruceb58