2020 GMC Sierra 1500 Other or unknown Problems
- Complaints
- 46about this part
- Share
- 10%of 484 total for the year
- Median mileage
- 7,000miles
- Trend
- RisingComplaints filed in the last 3 full calendar years are at least 25% higher than in the 3 years before.
NHTSA recorded 46 complaints about the other or unknown of the 2020 GMC Sierra 1500, 10% of the 484 complaints for this model year. Where a mileage was given, the median is 7,000 miles.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Brand new truck. Stuck at the gym in the middle of the night truck wont start. The interior lights, head lights, and radio wont shut off. Vehicle wont start. I'm assuming the battery was drained because interior lights, exterior lights, radio, wont shut off. Has to be some kind of electrical malfunction. Waiting on GM roadside.”
NHTSA complaint #11308116, filed 2020-02, 144 miles“Dangerous visibility hazard when backing up vehicle at night. Infotainment screen switches to full brightness when backup camera is activated, resulting in blinding light to driver. Driver can not backup safely without physically covering the screen to regain visibility. Screen brightness reflects off all 4 windows, windshield and back glass. Side mirrors are unusable in this condition. There was a fix for this issue on previous GM models, (prior to 2018), however no fix for 2019 - present”
NHTSA complaint #11397727, filed 2021-02, 20,000 miles“When stationary and preparing to start vehicle intermittently see service steering column lock message appears and disappear once vehicle is started. This was previously supposed to be addressed with service bulletin 20-na-21 however being told by service department that vehicle has all current updates applied a year ago, including the one that should of addressed the issue. Told that the vehicle history shows records of past loss of communication to dic but as they can't immediately reproduce no action was taken.”
NHTSA complaint #11397930, filed 2021-02, 8,800 miles“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.”
NHTSA complaint #11326057, filed 2020-05, 10 miles“Vehicle was going in for warranty recall; however, i requested they look at the DEF system as my DEF gauge would bounce between full and empty; along with, alert me of going into LIMP mode. GM Maintenance updated the recall and noticed that the DEF tank sensor failed and required to be replaced.”
NHTSA complaint #11662497, filed 2025-05Related service bulletins
- 11038463Oct 5, 2026This document assists GM dealer technicians with diagnosing torque converter concerns to ensure torque converter replacement is necessary. The torque converter part number will…
- 11037555Sep 26, 2026This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it.
- 11037550Sep 21, 2026This PI communicates the proper part numbers for transmission connectors and internal harness to prevent confusion when ordering
- 11037253Sep 4, 2026This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
- 11036713Aug 27, 2026This document assists GM dealer technicians with diagnosing torque converter concerns to ensure torque converter replacement is necessary. The torque converter part number will…
- 11036196Aug 7, 2026This Preliminary information communicates an issue where an aftermarket autostop device or rear taillights is causing a dead battery.
- 11035709Jul 31, 2026This document assists GM dealer technicians with diagnosing torque converter concerns to ensure torque converter replacement is necessary. The torque converter part number will…
- 11035350Jul 23, 2026This PI provides information to repair the door water deflector which is not sealed properly allows water into the door jam/sill area.
- 11035340Jul 21, 2026PI to help diagnose A/C concern
- 11035308Jul 21, 2026This PI provides diagnostic tips for diagnosing electric trailer brakes issues.
Other or unknown: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2026 | 11 | 7% |
| 2025 | 15 | 12% |
| 2024 | 34 | 9% |
| 2023 | 56 | 11% |
| 2022 | 76 | 13% |
| 2021 | 46 | 8% |
| 2020 | 46 | 10% |
| 2019 | 45 | 7% |
| 2018 | 25 | 8% |
| 2017 | 35 | 10% |
| 2016 | 35 | 10% |
| 2015 | 67 | 9% |
| 2014 | 92 | 12% |
| 2013 | 42 | 36% |
| 2012 | 37 | 35% |
| 2011 | 73 | 26% |
| 2010 | 46 | 27% |
| 2009 | 38 | 16% |
| 2008 | 42 | 11% |
| 2007 | 15 | 6% |
| 2006 | 3 | 2% |
| 2005 | 6 | 3% |
| 2004 | 1 | 0% |
| 2003 | 2 | 1% |
| 2002 | 4 | 2% |
| 2001 | 2 | 1% |
| 2000 | 2 | 1% |
| 1999 | 6 | 4% |
| 1997 | 1 | 1% |
Other parts of the 2020 GMC Sierra 1500
245 complaintsTransmission and drivetrain
99 complaintsElectrical system
81 complaintsBrakes
55 complaintsSteering
38 complaintsFuel system
27 complaintsEngine cooling
21 complaintsSuspension
18 complaintsVisibility (wipers, defrost, mirrors)
15 complaintsForward collision avoidance
14 complaintsBody and structure
13 complaintsVehicle speed control
12 complaints
← All problems reported for the 2020 GMC Sierra 1500
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology