Recall 21V346 affects 196 2019 Chevrolet Silverado 6500 and 6500 trucks for ECM software allowing excess speed. Repair is free at any franchised Chevrolet dealer.
Chevrolet is recalling 196 2019 Silverado 6500 vehicles because an incorrectly calibrated engine control module lets the truck exceed the tires' 75 mph speed rating. Driving above that rating can lead to tire failure and increase crash risk, and Chevrolet dealers will reprogram the module free of charge.
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What's wrong?
The engine control module, or ECM, is the truck computer that controls engine operation and holds the speed limiting calibration. On the 2019 Chevrolet Silverado 6500 and 6500 trucks in this recall, that software is supposed to keep the vehicle from going faster than the tires are rated to handle. The tire rating in this filing is 75 mph.
The problem is the calibration was set too high for the tire package installed on these trucks. GM testing found the ECM and body control module software would let the vehicle reach 79 mph, which is above the tires' maximum speed rating. The issue traces to tire speed limits not being correctly carried into the speed limiting software during development.
There is no warning sign before failure. The truck will not give the driver a special alert that the speed limiter is set above the tire rating, so the defect is in the calibration rather than a part the owner can inspect.
Who's affected?
Covers both 2019 Chevrolet 6500 nameplates tied to the same ECM software calibration.
| 2019 Chevrolet Silverado 6500 | Software |
|---|---|
| 2019 Chevrolet 6500 | Software |
| Units affected | 196 |
| Field incidents | NHTSA has logged no field incidents to date. |
A matching 2019 Chevrolet 6500 model name does not guarantee inclusion. Check your VIN to confirm whether your specific truck is included.
What's the safety risk?
Tire failure can occur if the vehicle speed exceeds the tire's maximum speed rating, increasing the risk of a crash. If your VIN is included, keep speed within the tire rating and schedule the ECM software update soon. Repair is free at any franchised Chevrolet dealer.
What should I do?
- Check your VIN to confirm your 2019 Chevrolet Silverado 6500 or Chevrolet 6500 is included in this recall.
- Contact your nearest franchised Chevrolet dealer to schedule the free ECM software update that corrects the speed-rating calibration.
- Bring the recall notice if you have it. If not, reference recall number 21V346 when you call.
- Avoid exceeding the tire speed rating until the ECM software update is complete.
- Call Chevrolet customer service at 1-800-222-1020 with questions about GM recall N202325530.
What happens at the repair
At the dealer, a Chevrolet technician updates the engine control module software so the truck stays within the tire speed rating covered by the recall. The software update and labor are free under the recall. Out-of-pocket repairs already paid are handled through the existing warranty, not through a separate reimbursement program, because the covered vehicles are under warranty. Ask the service desk how warranty coverage applies if you have prior repair paperwork.
| Reimbursement | Warranty coverage applies |
|---|
Timeline
| May 13, 2021 | NHTSA published the recall |
|---|---|
| May 13, 2021 | Dealer notification began |
| May 13, 2021 | Dealer notification ended |
| June 7, 2021 | Owner notification mailed |
| June 28, 2021 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 21V346?
Recall 21V346 covers 196 2019 Chevrolet Silverado 6500 and Chevrolet 6500 vehicles with incorrectly calibrated ECM software. The calibration lets the vehicle exceed the tires' 75 mph maximum speed rating. Tire failure can occur above that rating, increasing crash risk. Chevrolet dealers will update the ECM software for free.
What should I do if my 2019 Chevrolet Silverado 6500 or Chevrolet 6500 is on this recall?
Check your VIN to confirm your specific vehicle is included in recall 21V346. If it is, contact a franchised Chevrolet dealer to schedule the ECM software update. Reference recall number 21V346 and Chevrolet recall number N202325530 when you call. The repair is free.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost, and Chevrolet dealers will update the ECM software free of charge. Parts and labor are covered for included vehicles.
What is the safety risk in recall 21V346?
The risk is tire failure from driving faster than the tire speed rating. The ECM calibration allows speeds above the tires' 75 mph maximum rating. If tire failure occurs at speed, crash risk increases. The dealer repair corrects the ECM software.
When were owners notified about recall 21V346?
Chevrolet mailed owner notification letters on June 7, 2021. If you bought the vehicle used or never received a letter, check your VIN to confirm whether your specific 2019 Chevrolet Silverado 6500 or Chevrolet 6500 is included.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/21V346000 |
|---|---|
| Chevrolet customer service | 1-800-222-1020 |
| NHTSA recall # | 21V346 |
| NHTSA recall # (full) | 21V346000 |
Source documents
-
Download Recall Document (PDF) (PDF) - Download Quarterly Report (PDF)
- Download Misc. Document (PDF)
- Download Recall Document (PDF) (PDF)
- Download Owner Notification Letter (PDF)
- Download Owner Notice (PDF)
- Download Recall Report (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 23, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →