AI Damage2021 Chevrolet 6500HD: common problems
The maker issued 194 service bulletins for this year. Details by component below, with sources.
Key figures
- Technical service bulletins (TSB)
- 194
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Electrical system | 0 | 0 | 40 |
| Equipment | 0 | 0 | 39 |
| Engine | 0 | 0 | 26 |
| Engine and cooling | 0 | 0 | 18 |
| Powertrain | 0 | 0 | 17 |
| Wheels | 0 | 0 | 14 |
| Steering | 0 | 0 | 6 |
| Suspension | 0 | 0 | 6 |
| Structure | 0 | 0 | 5 |
| Fuel/propulsion system | 0 | 0 | 4 |
| Service brakes | 0 | 0 | 3 |
| Exterior lighting | 0 | 0 | 2 |
| Fuel system | 0 | 0 | 2 |
| Visibility | 0 | 0 | 2 |
Comparison
What to check before buying
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Engine. Cold start, unusual noises, oil leaks and engine codes.
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it
- This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance
- This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues
- PI to help diagnose A/C concern
- This Preliminary information communicates an issue with an OTA pending message still displayed after an…
This Preliminary information communicates an issue with an OTA pending message still displayed after an OTA event and how to reset/clear the message.
- Pi created to provide GM dealers with information on gathering information for projection issue
- This preliminary information communicates information about how to determine if a wheel and tires size…
- This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a…
This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a Technical Assistance Case in CX Connect.
- This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic…
This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC'ss
- This PI advised dealer technicians of possible causes of diesel fuel contamination in gasoline powered…
This PI advised dealer technicians of possible causes of diesel fuel contamination in gasoline powered vehicles and advises of warranty direction.
- This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic…
- This service bulletin provides information on Tire Sidewall Irregularities
NHTSA lists 194 bulletins for this year; the 12 newest are shown here.
Other years of this model
Questions and answers
What are the most common problems with the 2021 Chevrolet 6500HD?
There are no owner complaints in the NHTSA data for this year; the data comes from 194 manufacturer service bulletins.
How many service bulletins (TSB) were issued for the 2021 Chevrolet 6500HD?
NHTSA lists 194 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2021 Chevrolet 6500HD from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2021 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-04.