5.7

fairly significant
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
14,814 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2018 GMC Sierra 3500 brakes problems

brakes problem

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2018 GMC Sierra 3500 Owner Comments

problem #5

Jul 052022

Sierra 3500

  • miles

A D V E R T I S E M E N T S

A persistent, very distracting alert saying "service trailer brakes"

- Grand Jct, CO, USA

problem #4

Mar 282018

Sierra 3500

  • 0 miles
The contact owns a 2018 GMC Sierra 3500. The contact stated after driving on a long downhill road at an undisclosed speed with his 2017 Highland Ridge 349 RV hooked to the vehicle, as he was reaching a leveling point and depressing the brake pedal to slow the vehicle, the brakes failed to operate as needed. The contact stated that as he depressed the brake pedal further, the brake pedal overheated and would no longer respond properly. The contact stated that the vehicle was rated at 22,000-23,000 while the trailer was 14,300 pounds loaded maximum. The contact stated that the trailer currently weighed 11,000 pounds. There were no warning lights illuminated. The contact stated that the failure had been reoccurring while driving. The vehicle was taken to the dealer who informed the contact that the braking system was operating properly. The manufacturer was not notified of the failure. The failure mileage was unknown.

- Smyrna, DE, USA

problem #3

Apr 092020

Sierra 3500

  • miles
April 9th 2020 I was operating my vehicle a 2018 GMC Sierra 3500 denali equipped with the diesel package. I was towing a bobcat skid steer on a trailer with a total weight of approximately 4300lbs. I was traveling at about 45 mph when I encountered a red light. With plenty of room to stop I applied the brakes as normal. They initaillay grabbed and slow my travel to about 40 mph. Then out of what seemed nowhere the brake pedal rapidly went to the floor and the vehicle freewheeled through the light. I attempted multiple times to ease off the pedal and reapply to no avail. Upon entering the intersection I nearly crashed into a vehicle. When I nearly I mean with inches. I immediately slammed the E-brake bringing the truck to a skiddding halt. After dropping the trailer off in an empty parking lot my vehicle went to my local dealer. The service adviser who 1st encountered the vehicle experienced the issue 1st hand.after having it for nearly a week they called today to say 'they can't find the any issues'. that makes this situation even more dangerous. You're unaware when this can happen. These vehicles need to have a new recall immediately

- Selden, NY, USA

problem #2

Nov 022019

Sierra 3500

  • 58,000 miles
I was driving up hill the truck lost power died/shutdown so I had no power steering no power brakes we live on a country rural road. Had the truck towed to kendall Chevrolet in eugene Oregon where it has been since November 2 with electrical issues that they are trying to pinpoint.

- Springfield, OR, USA

problem #1

May 092018

Sierra 3500

  • 16,068 miles
The contact owns a 2018 GMC Sierra 3500. While driving approximately 60 mph and hauling a trailer, the ABS, service trailer brake, service power steering, and service stabilitrak warning indicators illuminated. Also, the vehicle lost braking functionality. The contact also stated that the failure occurred while not towing a trailer. The vehicle was taken to buster miles Chevrolet (1884 almon St, heflin, al 36264, (256) 781-4536) to be diagnosed, but the mechanic was unable to retrieve a fault code. The contact was informed that the failure may be due to a wheel speed sensor. The vehicle was not repaired. The manufacturer was informed of the failure. The approximate failure mileage was 16,068.

- Heflin, AL, USA

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