2020 GMC Sierra 2500 service brakes problems
12 owner complaints filed with NHTSA name the service brakes on the 2020 GMC Sierra 2500 — 16% of all complaints for this model year.
What owners report
“The main tailgate will not go down or function properly and it says online there is a national recall for this, but does not come up when I search my vehicle. When I turn on my left turn signal the brights flash for no reason and this is a known major issue with the vehicles as well. The trucks…”
filed Dec 20, 2025
“I have a 5th wheel with solar and my brake controler stops working periodically. I have a case# with gm 9-13676268071. I also hjave an extended warranty with gm and it's not covered due to my vin# not being on a bullentin# 23-na-149. Gm also has a customer satisfaction progream # n232414840 and…”
filed Sep 20, 2024
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Service Brakes problems in other Sierra 2500 years
| Year | Reports | Share |
|---|---|---|
| 2025 Sierra 2500 | 6 | 24% |
| 2024 Sierra 2500 | 14 | 14% |
| 2023 Sierra 2500 | 3 | 10% |
| 2022 Sierra 2500 | 4 | 10% |
| 2021 Sierra 2500 | 6 | 12% |
| 2019 Sierra 2500 | 4 | 13% |
| 2017 Sierra 2500 | 8 | 22% |
| 2016 Sierra 2500 | 10 | 17% |
| 2015 Sierra 2500 | 5 | 6% |
| 2014 Sierra 2500 | 1 | 3% |
| 2013 Sierra 2500 | 3 | 7% |
| 2011 Sierra 2500 | 1 | 2% |
Other reported problem areas on the 2020 GMC Sierra 2500
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.