2021 Chevrolet Silverado 2500 Other or unknown Problems
- Complaints
- 7about this part
- Share
- 8%of 89 total for the year
- Median mileage
- 110,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 7 complaints about the other or unknown of the 2021 Chevrolet Silverado 2500, 8% of the 89 complaints for this model year. Where a mileage was given, the median is 110,000 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Originally Chevrolet offered a 2 phase approach for this recall. First phase was to install monitoring software in the ECU and TCU to monitor for early transmission control valve premature wear. Second phase was to actually replace the suspect valve. I've just received a second correspondence from Chevrolet for this recall, now only offering Phase 1, TCU and ECU monitoring software installation. So if the monitoring software detects premature valve failure, the vehicle will be limited to 5th gear. I don't think limiting a vehicle to 5 our of 10 gears is a safe solution. …”
NHTSA complaint #11638112, filed 2025-01“The tailgate on my truck is electrically opened & closed. I've been having trouble with the tailgate opening randomly, even while driving. This has happened multiple times and can create a very dangerous situation, especially if i'm hauling something in the bed of the truck and it could possibly fall out if the tailgate were to open. Once i was hauling a bunk bed and the tailgate opened without me knowing it. Fortunately, we were driving through town on a flat road when it happened & nothing fell out. Someone behind me pulled up beside me to let me know my tailgate just opened. …”
NHTSA complaint #11679809, filed 2025-08“Unable to remove key from ignition for a period of time ie. 30 sec. to a minute or more. After driving the vehicle for a either a long or short period of time and you park it, you can't turn the ignition lock all the way off.”
NHTSA complaint #11688418, filed 2025-09“The contact owns a 2021 Chevrolet Silverado 2500. The contact stated while driving uphill at an undisclosed speed with a trailer hitched to the vehicle, the vehicle downshifted inadvertently, which caused the trailer to fishtail. The contact stated that he lost control of the vehicle, and he was able to slowly regain control of the vehicle. The contact stated that the failure had been recurring while driving. The vehicle was taken to an unknown dealer, where the cause of the failure could not be determined. The vehicle was not repaired. The manufacturer was not notified of the failure. …”
NHTSA complaint #11549447, filed 2023-10, 110,000 miles“The rear window in my 2021 Silverado 2500 leaks when it rains, water is getting in the carpet/seats creating a bad odor and mold. The dealership will not assist in fixing this known issue.”
NHTSA complaint #11724840, filed 2026-03Related 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 | 2 | 15% |
| 2025 | 8 | 27% |
| 2024 | 24 | 17% |
| 2023 | 8 | 17% |
| 2022 | 21 | 22% |
| 2021 | 7 | 8% |
| 2020 | 10 | 9% |
| 2019 | 8 | 11% |
| 2018 | 6 | 11% |
| 2017 | 3 | 6% |
| 2016 | 7 | 6% |
| 2015 | 22 | 12% |
| 2014 | 7 | 18% |
| 2013 | 13 | 25% |
| 2012 | 8 | 15% |
| 2011 | 13 | 13% |
| 2010 | 1 | 5% |
| 2009 | 11 | 18% |
| 2008 | 15 | 8% |
| 2007 | 14 | 7% |
| 2006 | 5 | 3% |
| 2005 | 3 | 1% |
| 2004 | 5 | 1% |
| 2003 | 8 | 2% |
| 2002 | 3 | 1% |
| 2001 | 3 | 1% |
| 2000 | 3 | 2% |
Other parts of the 2021 Chevrolet Silverado 2500
30 complaintsElectrical system
17 complaintsBrakes
12 complaintsFuel system
9 complaintsEngine
8 complaintsLatches, locks and linkages
8 complaintsBody and structure
4 complaintsForward collision avoidance
3 complaintsAir bags
2 complaintsBack-over prevention (rear camera)
2 complaintsExterior lighting
2 complaintsSteering
2 complaints
← All problems reported for the 2021 Chevrolet Silverado 2500
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 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