Table 1 shows one common service brakes related problems of the 2024 GMC Sierra 3500.
| Problem Category | Number of Problems |
|---|---|
| Service Brakes problems |
My truck is experiencing the brake controller failures as documented in gm bulletin n232414840 - customer satisfaction program intermittent loss of trailer brakes. This problem has occurred several times over the past year. I thought it was the wiring on my trailer - so I checked and found no problems (plus it works properly on other tow vehicles). Additionally, the problem resets and works properly after turning the truck off and back on (resets the system). It then works properly until it unexpectedly disconnects again. I thought the problem was unique to my vehicle until I got online and discovered that this is a known issue for others as well (2024 gm hd trucks). I contacted my gm dealer (and gm's customer satisfaction center as noted in the bulletin) and they informed me that my truck is not covered under this recall (not one of the covered vins). I told them that I'm having this issue and they told me to report the problem to the NHTSA. Needless to say, gm has not included all the applicable vehicles in their recall (like mine) and I need the issue corrected before it causes a serious accident.
This is my 4th gm 3500 dully and the first time with this kind of problem. I took my truck in for inspection and it came back with a clean bill of health about 25,000 miles on the 2024. When I got it back I noticed a vibration when breaking. I took the truck back in to find it had bluing on the rotors and the break pads have holes in them. I was told this came from over heating. I looked up info to see if this was a common problem and found the in 2022 gm changed the material to help with noise problems and this material had been know of premature break problems. I called gm customer service and they told me to work with the dealership, the dealership called the district manager and all parties have decided to ignore the issue. I also have 2 of these truck driven by 2 different people with the same problem at the same millage. I will make a 2nd report for the 2nd truck.
I just bought my truck a 2024 GMC 3500 and in a few weeks after purchase. I took my truck in for a break vibration. I took the truck back in to find it had bluing on the rotors and the break pads have holes in them. I was told this came from over heating. They said it was missed on the pre sale inspection they did. I looked up info to see if this was a common problem and found the in 2022 gm changed the material to help with noise problems and this material had been know of premature break problems. The dealership denied doing the work under warranty. I called gm customer service and they told me to work with the dealership, the dealership called the district manager and all parties have decided to ignore the issue. I also have 2 of these truck driven by 2 different people with the same problem at the same millage. I will make a 2nd report for the 2nd truck.
The contact owns a 2024 GMC Sierra 3500. The contact stated while driving at approximately 60 mph and towing a forest river riverstone legacy 5th wheel trailer, the brake pedal was depressed to slow for oncoming stopped traffic; however, the vehicle failed to respond as needed with the “service trailer brake” warning light illuminated. The contact was able to stop however, the brake pedal had to be depressed to the floorboard to slow the vehicle. The contact had taken the vehicle to a local dealer and was made aware of customer satisfaction program: n232414840 - and replaced the trailer brake power module (tbpm). The vehicle was repaired; however, the failure reoccurred. The contact returned the vehicle to the same dealer and the trailer brake power module was replaced a second time. The vehicle was repaired; however, the failure reoccurred. The contact had taken the vehicle to another dealer who diagnosed the vehicle and determined that the failure was with the 5th wheel RV. The vehicle was not repaired. The manufacturer was informed of the failure. The failure mileage was approximately 20,000.
Breaks and/or drive train. It is available for inspection. 1) breaks sink causing slowed break time and decreased breaking ability. If the breaks are "pumped", more often than not, they will come back up to full pedal. However, in an emergency breaking situation, there is not time to "pump" the breaks. I was nearly in an accident recently when the break pedal would not stop the truck in time, due to the soft break pedal. I literally had to steer to the shoulder of the road. 2) when placing transmission in drive or reverse from the park position, then taking foot off of break pedal, there is about a 1 - 2 foot roll, then the truck stops as if the e-break has been engaged (but it is not engaged). By tapping the accelerator, it will "break free" (with a popping sound and a slight "jerk" in the truck) and then roll fine. This does not always happen ~ guestimate of about 10% of the time. 3) I don't know if this is related, but when I set the drive mode to "normal", it automatically goes to "off road" ~ this happens no matter the driving conditions. This isn't safety related necessarily, however, it may be a part of the total problem. . . . It also decreases my fuel economy. I took the truck to the local GMC dealer/shop. They said the truck had 2 recalls and they took care of those. They believed one of the recalls would help solve the "sticking" when placing in drive or reverse ~ it did not. They also (supposedly) checked the breaking system and took it for a test drive. They said the breaks were fine. I doubt this happened as the soft break pedal and the need to "pump" the breaks to bring them to full pedal is completely obvious. I took the truck home after the inspection and recall. The same issues continued, so I took it back to the shop where it was inspected again. Again, I was told everything was in working order ~ it is not! there are no warning lights that I can find to indicate there is an issue. I'm begining to think that I should have bought a ram truck. . .
The truck disengages the 5th wheel trailer brakes. The dic states "trailer brakes disabled - service required". I intermittently lose trailer braking capability.
The in cab brake controller does not work with electric over hydraulic trailer brakes. In my research to diagnose and fix the problem I find out GMC has known about this for years and has done nothing to correct. I pulled code c1114 and GMC issued a bulletin for part number (k58-036-00) which I purchased and still did not correct this issue. In short there are many 3500 trucks out there running with no trailer brakes. Here is the worst of this problem. If brakes are tested at a stop they appear to work perfectly however once driving this is when the error code is delivered to the truck so the brakes work at a stop when not needed and do not work under driving when they are needed. GMC has ignored this for years and after spending more of my hard earned money for a fix that did not fix the problem. Below I had to choose a date however this has been an issue since first purchase December 5th 2023 to present.