Total Complaints
2 filings
CHEVROLET SILVERADO 4500 · model year
2021 CHEVROLET SILVERADO 4500
2 NHTSA complaints, and 1 active recall for this specific cohort.
NHTSA overall rating
Not crash-tested
New Car Assessment Program
The 2021CHEVROLETSILVERADO 4500 carries 2 consumer safety complaints in NHTSA's Office of Defects Investigation database for this specific model-year cohort. Within that volume, owners reported 0 crashes, 0 fires, 0 injuries, and 0 fatalities. No NCAP 5-star crash-test rating is available for this model year in the federal database.
Component-level analysis is where model-year complaints become actionable: the top complaint category for the 2021 SILVERADO 4500 is service brakes, hydraulic with 2 filings. Concentration in one or two component groups is the classic signature of a systemic defect; a flat distribution usually reflects normal aging, warranty complaints, or isolated build-plant variability. This model year has 1 active recall campaign, which means the manufacturer is obligated to remedy the covered defect at no charge for the life of the vehicle — the full NHTSA campaign numbers are listed below.
NHTSA currently has 57 investigation files overlapping the 2021 SILVERADO 4500, and 2 remain open. Owners comparing this cohort against neighboring years should pair the counters above with the complaint-by-year trend on the parent model page — a spike in a single year often tracks to a platform refresh, a new transmission supplier, or an updated ECU calibration. Use the related-complaint feed below to read raw owner narratives before deciding whether any pattern here affects your specific use case.
2
Complaints
0
Crashes
0
Fires
0
Injuries
0
Deaths
Crashes Reported
0 reports
Source
NHTSA ODI
Federal complaints database
Complaints vs. fleet median (215)
At or below the fleet median complaint volume.
Complaints by Component
| Component | Count |
|---|---|
| SERVICE BRAKES, HYDRAULIC | 2 |
Recalls (1)
25V39000012/06/2025
SERVICE BRAKES, HYDRAULIC:BRAKE FLUID LOW WARNING:SWITCH/SENSOR/FLOAT
General Motors (GM) is recalling certain 2019-2024 Chevrolet Silverado Medium Duty 4500HD, 5500HD, and 6500HD vehicles. The brake pressure sensor assembly may leak brake fluid into the brake pressure switch and cause a short circuit.
Recent Complaints
20230530SERVICE BRAKES, HYDRAULIC
The contact owns a 2021 Chevrolet Silverado 4500HD. The contact received notification of NHTSA Campaign Number: (TBD); Manufacturer Recall Campaign Number: N222375270 (Service Brakes, Hydraulic) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer was not made aware of the issue. The manufacturer was not made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.
20230502SERVICE BRAKES, HYDRAULIC
The contact owns a 2021 Chevrolet Silverado 4500HD. The contact received notification of Manufacturer Recall Number: N222375270 (Service Brakes, Hydraulic), NHTSA Campaign Number: (TBD) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer was made aware of the issue. The manufacturer was not made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.
Compare 2021CHEVROLETSILVERADO 4500 to Similar Vehicles
NHTSA Investigations 2 Open
EA25007Engineering AnalysisOpen
Loss of motive power due to engine failure
PE23022Preliminary EvaluationClosed
Loss of Motive Power due to the Battery Energy Control Module
PE20016Preliminary EvaluationClosed
Electric Vehicle Battery Fires
EA20002Engineering AnalysisClosed
Outboard Front Seat Belt Anchor Cable Failure
PE20011Preliminary EvaluationClosed
Fuel Line Leak
Frequently Asked Questions
How many complaints does the 2021 CHEVROLET SILVERADO 4500 have?▼
The 2021 CHEVROLET SILVERADO 4500 has 2 NHTSA complaints, 0 crashes, 0 fires, 0 injuries, and 0 deaths reported.
Are there any recalls for the 2021 CHEVROLET SILVERADO 4500?▼
Yes, the 2021 CHEVROLET SILVERADO 4500 has 1 recall(s). The most common affected component is SERVICE BRAKES, HYDRAULIC:BRAKE FLUID LOW WARNING:SWITCH/SENSOR/FLOAT. Recalls are issued by NHTSA and manufacturers must provide a free remedy.
What are the most common problems with the 2021 CHEVROLET SILVERADO 4500?▼
The most-complained component for the 2021 CHEVROLET SILVERADO 4500 is SERVICE BRAKES, HYDRAULIC with 2 complaints. Other frequently reported areas include various components.
Is the 2021 CHEVROLET SILVERADO 4500 safe to buy?▼
Review the complaint history, crash and fire reports, safety ratings, and recall status on this page to make an informed decision. No NHTSA crash test rating is available for this model year. Compare with other model years using the links above.
Where does this data come from?▼
All complaint, recall, and safety rating data is sourced from the National Highway Traffic Safety Administration (NHTSA). Complaints are filed by vehicle owners through NHTSA's Office of Defects Investigation.
Vehicle Safety Guides
Data as of 2025. Sources: NHTSA Office of Defects Investigation (ODI) complaints database, NHTSA recall campaign API, NHTSA NCAP crash-test ratings, and NHTSA FARS for fatality cross-reference.
Read our methodology — how this data is sourced, computed, and verified.