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Old 02-26-2022, 01:38 PM   #21
Mark_TX
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Quote:
Originally Posted by Javi View Post
Just a note.. I don't fool with the Chevy factory brake controller but with my '15 Ford I had to switch the controller to electric over hydraulic when the disc brakes were added. No additional adapter was needed.



Have you told the truck that the trailer is electric over hydraulic????
There's no option on the GM truck to change that
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Old 02-26-2022, 02:58 PM   #22
chuckster57
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Originally Posted by Mark_TX View Post
I forgot to mention that the RV is the legacy package so it has disc brakes.
Well now you tell us!!!

Just kidding, but I bet the issue is the brake controller. If you cant configure the integrated brake control, I would install a Prodigy P3 and use it.
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Old 02-26-2022, 03:18 PM   #23
Javi
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There's no option on the GM truck to change that
Well darn. Another reason to keep my Ford
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Old 03-03-2022, 03:30 PM   #24
Army Paladin
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Oh boy. I had the problem last year. I traced wires, looked at fuzes, changed trailer wiring, changed truck connections and plugs. I finally found out that our truck has a brake controller module up under the spare tire. I got one from amazon and it has been good for about a year now. This is a known issue with GM but they won’t publish it for a fix or a recall.
At one point I was looking at replacing the rear wiring harness. Oh heck no. The only way to replace it is the entire frame wiring harness. Only a couple thousand to have that done. Glad I found out about the controller.
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Old 03-04-2022, 06:59 AM   #25
mikz86ta
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Just a FYI. We had a 2011 Sierra 3500 and it is super common for the stock trailer brake controller to go bad. It's frame mounted near the spare tire. Just Google it on the GM truck forums and you will realize just how bad it is...even guys who don't tow will have the fault code on their trucks. I think it's $30 or more now for a new one. Some have cleaned the ground wire nearby and fixed it. Others have replaced the controller.
It's a horrible design choice.
Your 2015 even tho the body is different, has the same underside as our 2011 was. They didn't redesign much anything between body styles. The body and cab electronics PKG is really the only difference.
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Old 03-04-2022, 07:02 AM   #26
mikz86ta
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Originally Posted by Army Paladin View Post
Oh boy. I had the problem last year. I traced wires, looked at fuzes, changed trailer wiring, changed truck connections and plugs. I finally found out that our truck has a brake controller module up under the spare tire. I got one from amazon and it has been good for about a year now. This is a known issue with GM but they won’t publish it for a fix or a recall.
At one point I was looking at replacing the rear wiring harness. Oh heck no. The only way to replace it is the entire frame wiring harness. Only a couple thousand to have that done. Glad I found out about the controller.
💯, GM will not issue a recall or fix it. Just like their oil consumption on early 5.3's, just like the CP4.2 failures on their LML Duramax's, etc
I've left GM for these reasons alone. And refuse to go back until they own their mistakes.
Just think the wonders they will do in the EV market. 😂
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Old 03-12-2022, 09:05 AM   #27
Mark_TX
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Brakes are fixed with the Hyrastar HBA-CAM.

I would like to also thank you all for the suggestion of a bigger tow vehicle. Bought a 2020 Gmc 3500 denali dually. [emoji16]

Of course it had the same brake issue but it the HBA-CAM fixed it as well.
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Old 03-12-2022, 10:10 AM   #28
sourdough
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Congrats on that new truck! Your towing world just got brighter.
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Old 03-12-2022, 10:14 AM   #29
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Good choice on trucks ! Congrats
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Old 03-12-2022, 02:24 PM   #30
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Quote:
Originally Posted by Mark_TX View Post
Brakes are fixed with the Hyrastar HBA-CAM.

I would like to also thank you all for the suggestion of a bigger tow vehicle. Bought a 2020 Gmc 3500 denali dually. [emoji16]

Of course it had the same brake issue but it the HBA-CAM fixed it as well.
Good choice on the tow vehicle!
That Duramax/Allison combo is tough to beat for towing.
Have had 2 dually GMCs with that combo for a total of 300+k miles towing a couple different 5ers weighing in at 16.5k each for about 50%+ of those miles, never more than very minor issues most of which were warrantied.
You've greatly increased your towing experience by 100% over the 2500.
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Old 03-12-2022, 02:30 PM   #31
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Originally Posted by travelin texans View Post
Good choice on the tow vehicle!

That Duramax/Allison combo is tough to beat for towing.

Have had 2 dually GMCs with that combo for a total of 300+k miles towing a couple different 5ers weighing in at 16.5k each for about 50%+ of those miles, never more than very minor issues most of which were warrantied.

You've greatly increased your towing experience by 100% over the 2500.
Love me a duramax/Allison combo.

I will keep my 2500 for my daily driver at least for now. [emoji16]
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Old 03-12-2022, 02:44 PM   #32
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Love me a duramax/Allison combo.

I will keep my 2500 for my daily driver at least for now. [emoji16]
Congrats on the new truck!
Now go to the ""user CP" in the black bar, then to "edit signature" then add the make, model & year of your rv & tow vehicle, drop down to "save changes", now this info will appear on every post so you won't have to be constantly be ask "what vehicle/rv" when asking questions.
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