Table 1 shows two common structure related problems of the 2020 GMC Sierra 3500. The number one most common problem is related to the body (four problems). The second most common problem is related to the structure (one problem).
| Problem Category | Number of Problems |
|---|---|
| Body problems | |
| Structure problems |
Known defect with 2019 and now 2020 GMC sierra trucks. Design was updated for 2021+ which has corrected the seal failure defect. Gm has issued a service bulletin to dealers about how to repair the problem. Back window is leaking water. Defective seal noted by gm. Read details...
The contact owns a 2020 GMC Sierra 3500. The contact stated that while driving 45 mph with passengers seated in the rear seats, the passengers became aware that water was entering the vehicle between the window and frame. There were no warning lights illuminated. Read details...