NHTSA recall · Reported July 1, 2021
CHEVROLET,GMC 2017-2019: EQUIPMENT:ELECTRICAL:ENGINE BLOCK HEATER
General Motors, LLC (GM) is recalling certain 2017-2019 Chevrolet Silverado 2500, 3500 and 2017-2019 GMC Sierra 2500 and 3500 vehicles equipped with a Duramax diesel 6.6 liter eng…
Chevrolet,Gmc recalled General Motors, LLC (GM) is recalling certain 2017-2019 Chevrolet Silverado 2500, 3500 an….
CHEVROLET,GMC 2017-2019: EQUIPMENT:ELECTRICAL:ENGINE BLOCK HEATER was recalled by Chevrolet,Gmc in July 1, 2021. Reason: General Motors, LLC (GM) is recalling certain 2017-2019 Chevrolet Silverado 2500, 3500 and 2017-2019 GMC Sier…. Remedy: Dealers will replace engine block heaters and heater cords. Vehicles that have this featu…. Verify recall #21V496000 with the NHTSA before acting.
The recall
Chevrolet,Gmc issued this NHTSA recall-General Motors, LLC (GM) is recalling certain 2017-2019 Chevrolet Silverado 2500, 3500 and 2017-2019 GMC Sier….
- None
- agency class
- July 1, 2021
- reported
Sourced from official NHTSA enforcement records. Verify recall #21V496000 with the agency before acting. Full product description, hazard, remedy, and related recalls are below.
Recall Insight
The number of affected units is not disclosed in the agency filing, which is common for drug and food recalls where lot-level tracking supersedes unit counts. Distribution scope (see Distribution below) directly affects the consumer exposure window and determines whether a recall remains regional or escalates into a nationwide advisory. Consumers holding this product should act on the agency's documented remedy above rather than relying on general guidance.
Within the same product category the archive holds 6 closely related recalls, 3 from NHTSA - clustering in a narrow category often points to a systemic quality-control or supplier issue rather than a one-off defect. Always verify the recall number against the official agency record before acting.
Vehicles recalls over time
Where this recall sits in its category - 7,783 vehicles recalls on record
Product description
General Motors, LLC (GM) is recalling certain 2017-2019 Chevrolet Silverado 2500, 3500 and 2017-2019 GMC Sierra 2500 and 3500 vehicles equipped with a Duramax diesel 6.6 liter engine and an optional engine-block heater cord. An electrical short-circuit may occur in the engine-block heater cable or in the terminals that connect the heater cable to the block heater.
Reason for recall
General Motors, LLC (GM) is recalling certain 2017-2019 Chevrolet Silverado 2500, 3500 and 2017-2019 GMC Sierra 2500 and 3500 vehicles equipped with a Duramax diesel 6.6 liter engine and an optional engine-block heater cord. An electrical short-circuit may occur in the engine-block heater cable or in the terminals that connect the heater cable to the block heater.
Hazard
An electrical short-circuit can increase the risk of a fire.
Remedy, what to do
Dealers will replace engine block heaters and heater cords. Vehicles that have this feature disabled as a remedy to the safety condition will be contacted and offered replacement block heaters and heater cords under a separate customer satisfaction program, free of charge. GM will provide free replacement block heaters and cords under a separate customer satisfaction campaign. For vehicles previously included in recall 19V-328, the heater cord will be replaced and rerouted, free of charge. In
Recall Profile
| Attribute | Value |
|---|---|
| Agency | National Highway Traffic Safety Administration |
| Severity class | Not classified by agency |
| Status | Active |
| Recall number | 21V496000 |
| Date reported | July 1, 2021 |
| Date initiated | July 1, 2021 |
| Recalling firm | Chevrolet,Gmc |
| Affected scope | Not disclosed |
| Distribution | United States |
| Official source | NHTSA notice → |
Profile values are sourced directly from the official NHTSA enforcement record. Source: National Highway Traffic Safety Administration.
What to do with this recall
Dealers will replace engine block heaters and heater cords. Vehicles that have this feature disabled as a remedy to the safety co…
- Check the recall number (21V496000) and product description against the item you own. Search the archive
- Confirm the current status and remedy on the official NHTSA notice before acting. NHTSA notice
- Follow the documented remedy (refund, replacement, repair, or disposal) rather than general advice. What to do next
This page summarizes the official NHTSA record for research and awareness; it is not legal, medical, or safety advice. Verify with the issuing agency before acting.
Frequently Asked Questions
What product was recalled? ▼
Why was this product recalled? ▼
What should consumers do? ▼
Which agency issued this recall? ▼
Where was the recalled product distributed? ▼
How do I report an injury from a recalled product? ▼
Nationwide recalls with similar severity or category timing
Vehicle and equipment notices outside this manufacturer and filing state, matched by archive severity grade and report timing.
Similar severity · nearest report date
Same archive severity grade, closest by report date among other firms and states.
Similar Vehicles · nearest report date
Same product category, closest by report date among other firms and states (deduped against the severity set).
Compare this recall with KTM North America Recalls Off-Road Motorcycles Due to Risk … → · All Vehicles recalls
Methodology · Corrections · Archive as of August 2026