Other or unknownPart report
2021 GMC Sierra 2500 Other or unknown Problems
- Complaints
- 3about this part
- Share
- 6%of 52 total for the year
- Median mileage
- —not reported
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 3 complaints about the other or unknown of the 2021 GMC Sierra 2500, 6% of the 52 complaints for this model year. 1 of these say a crash was involved and 1 a fire, according to the filers.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Related service bulletins
- 11037555Sep 26, 2026This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it.
- 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…
- 11036392Aug 20, 2026This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues
- 11036196Aug 7, 2026This Preliminary information communicates an issue where an aftermarket autostop device or rear taillights is causing a dead battery.
- 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.
- 11035133Jul 17, 2026This PI was created to help avoid unnecessary front camera module replacements
- 11034977Jul 6, 2026The purpose of this PI is to inform dealer technicians of a normal cab pressure relief valve noise to avoid unnecessary part replacement
Other or unknown: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2026 | 1 | 8% |
| 2025 | 6 | 21% |
| 2024 | 12 | 11% |
| 2023 | 2 | 6% |
| 2022 | 6 | 13% |
| 2021 | 3 | 6% |
| 2020 | 18 | 23% |
| 2019 | 2 | 6% |
| 2018 | 5 | 14% |
| 2017 | 6 | 16% |
| 2016 | 7 | 12% |
| 2015 | 8 | 9% |
| 2014 | 7 | 23% |
| 2013 | 14 | 30% |
| 2012 | 7 | 23% |
| 2011 | 9 | 14% |
| 2010 | 4 | 40% |
| 2009 | 2 | 6% |
| 2008 | 9 | 14% |
| 2007 | 9 | 11% |
| 2005 | 3 | 3% |
| 2003 | 2 | 1% |
| 2002 | 3 | 2% |
| 2001 | 5 | 4% |
| 2000 | 1 | 2% |
Other parts of the 2021 GMC Sierra 2500
Transmission and drivetrain
13 complaintsExterior lighting
9 complaintsEngine
8 complaintsBrakes
7 complaintsElectrical system
6 complaintsBody and structure
5 complaintsLatches, locks and linkages
4 complaintsForward collision avoidance
3 complaintsAir bags
2 complaintsFuel system
2 complaintsBack-over prevention (rear camera)
1 complaintsLane departure
1 complaints
13 complaintsExterior lighting
9 complaintsEngine
8 complaintsBrakes
7 complaintsElectrical system
6 complaintsBody and structure
5 complaintsLatches, locks and linkages
4 complaintsForward collision avoidance
3 complaintsAir bags
2 complaintsFuel system
2 complaintsBack-over prevention (rear camera)
1 complaintsLane departure
1 complaints
← All problems reported for the 2021 GMC Sierra 2500
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 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