Trailer Brake Issue

redwngr · July 20

This story released Jul 20, 2024 on the GMAuthority website

(despite the name it is an enthusiast site, not a GM site)

GM To Fix Chevy Silverado HD Intermittent Trailer Brake Loss (gmauthority.com)

marpel · July 21

Thanks redwngr,

It appears, at least by that article, that the Sierras are not included. Also wonder why they jumped '21, '22 and '23?

redwngr · July 21

9 hours ago, marpel said:

Thanks redwngr,

It appears, at least by that article, that the Sierras are not included. Also wonder why they jumped '21, '22 and '23?

I didn't even think to check for the other one.

For whatever reason, GMauthority sometimes makes 2 articles -- one for each division -- :dunno:

Seems this is one of those times.

GM To Fix 2024 GMC Sierra HD Intermittent Trailer Brake Loss (gmauthority.com)

64BAwagon · July 21

The 24 models have a different electrical architecture and the trailer module is different than the 23 and earlier.

Some of the pre 24 issues were related to other things like plug compatibility. I changed my trailer plug to a Pollak to match the OEM on the truck in order to avoid issues. I havent had any on the 24 but my trailer doesnt have solar.

rjgvt · July 24

Dealer contacted me today to inform me that the module arrived. I have an appointment to get it replaced on Aug 6. I won't know if it fixes anything.

bruceb58 · July 24

On 7/21/2024 at 8:00 AM, 64BAwagon said:

I havent had any on the 24 but my trailer doesnt have solar.

It can happen even if you don't have solar if you have fully charged lithium batteries.

64BAwagon · July 24

I have 2 flooded lead batteries so neither one affects me.

asilverblazer · July 24

Has anyone tried adjusting the trailer brakes to see if any improvement can be had?

It's not recommended but I always adjust my trailer drums to provide 'heavy' drag when spinning the wheel/tire.

Chadw90 · July 25

9 hours ago, asilverblazer said:

Has anyone tried adjusting the trailer brakes to see if any improvement can be had?

It's not recommended but I always adjust my trailer drums to provide 'heavy' drag when spinning the wheel/tire.

Yes, to the point where the rims and hubs are hot from excessive drag.

Salzette · July 25

17 hours ago, 64BAwagon said:

I have 2 flooded lead batteries so neither one affects me.

We’ve only got flooded lead battery on our travel trailer. The only camping trip we had left last fall after getting the truck the brakes disconnected and reconnected a couple dozen times. I got the controller replaced before camping season this spring and it did correct the issue. So just a heads up that it’s not just a solar or lithium issue.

1fast ss · July 26

I have an appointment to get the recall completed next Thursday. I will give an update once I get it completed.

Chadw90 · July 28

Mine goes in tomorrow for the module replaced.
i will test the amperage as soon as its replaced.

Chadw90 · July 30

Module replaced

amperage prior to module replacement was 10.2 amps. Hooked up to the same trailer, amperage is now 14.4 amps.

AndrewF · July 30

Did GM "fix" this issue in later model year 2024's? I purchased my 2024 2500HD in mid June, and I believe manufacture date was in March. According to Chevrolet's website I don't have any open recalls/programs associated with my VIN. I'm assuming this trailer brake controller "recall" should show up there if applicable?

I called my dealer last Monday after the recall came out but they said they don't have any parts yet so I'd have to reach back out at some other time.

Edited July 30 by AndrewF

bruceb58 · August 2

On 7/30/2024 at 1:24 AM, Chadw90 said:

Module replaced

amperage prior to module replacement was 10.2 amps. Hooked up to the same trailer, amperage is now 14.4 amps.

You have the gain set the same?