Two problems related to mid/rear seats assembly have been reported for the 2015 GMC Sierra 1500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 GMC Sierra 1500 based on all problems reported for the 2015 Sierra 1500.
The vehicle always has a smell of dampness after a rain. Somehow water is getting into the vehicle. I have replaced the seal around the third-brake light which was thought to be the culprit, but no fix. The rear seat metal has rust on them from the damp. The driver's seat creaks when making turns. It is like it about to come apart. There should be a recall on this. People could get hurt if it happens. Le under the vehicle, I noticed that a body-mount is missing under the driver's side. This could be the reasons for the creaking. I am not sure!.
Rear seat headrests too low to be safe and effective in crash. They are both too small and to not stay locked in the far up position. Vehicle has been to the dealership multiple times for issue to be reviewed. At this time dealership claims headrest function is normal.
| Seats problems | |
| Mid/rear Seats Assembly problems | |
| Seat Broken problems |