Table 1 shows one common service brakes related problems of the 2017 GMC Sierra 3500.
| Problem Category | Number of Problems |
|---|---|
| Service Brakes problems |
Trailer brake system connection warning intermittent when towing it will say trailer not connected, while still having a secure 7 pin connection. This causes me to loose trailer brakes. My camper is nearly 14,000 lbs. Very dangerous situation. Happened since new. Was into / complained to gm service dept over 6 times.
Service trailer braking system. Faulty control in the dash. Known issue per mechanic but no recall issued. Safety issue as trailer brake may not function properly when towing as a result.
Brake are very spongy all the time we’ll while driving in parking lot at low speed we lost brakes happen to hit person in front. This has been a continuous problem to point we are scared to even use the truck to go to store. Took it to firestone. They told me it was the master cylinder. So they replaced that, replaced the front rotors and pads, did a fluid exchange abs as well? don’t know what that is. On the internet there is tons of this issue. I even see GMC 1500 is having this issue and there is a recall for the recalibration electric brake controller? couldn’t it include the full sierra line?. Why not on the 2500, 3500? looks to be same system? rotors and calipers are different thats it if anyone can help please let me know. It’s not covered under warranty and they want to replace some pump for $1500. I just paid $1500 for something totally different.
When you put on the brakes you have to press so hard and I mean hard to get it to stop. It was not like that when it was new. It you put atrailer behind the truck and the trailer has breakes that is what stop the truck not the truck brakes. It is safe to drive. It has been going on for about 3 month. 19/2019.