One problem related to warning has 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.
Additional information re odi 116346689: tried to report to gm using 800-462-8782 provided by you. Agent would not accept any information that I tried to provide, including year/make /model and would not confirm or deny that the issue was known by them. Agent said that the dealer would report their inability to fix the issue directly to gm, and that I could not. I have no way of knowing if the dealer made this report to gm. Calling this number was an infuriating, complete waste of time.
| Assist problems | |
| Lane Departure problems | |
| Warning problems |