39 problems related to equipment have been reported for the 2020 GMC Sierra 1500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2020 GMC Sierra 1500 based on all problems reported for the 2020 Sierra 1500.
After vehicle sits idle for a while, the vehicle makes a high pitch whistling sound on startup that last for approximately minute of driving.
Navigation states to turn right when it should be left or vice versa. This was a problem on the 2016-2017 models also.
Can not see anything backing up in the dark because of backup camera. The picture on the screen is grainy and washed out so all you see are blobs of nothing.
The backup camera is entirely too bright at night. It is nearly impossible to see the mirrors due to the brightness.