2 recalls and 1 owner complaint on file with NHTSA for the 2021 Chevrolet 4500HD.
2
recalls
1
owner complaints
0
complaints mentioning a crash
1
mentioning a fire
Recalls apply to specific production ranges. To see whether a particular car still has an open recall, enter its VIN at nhtsa.gov/recalls. Repairs for safety recalls are free at authorised dealers.
2021 Chevrolet 4500HD recalls
Service brakes, hydraulic
NHTSA campaign 23V266000 · reported April 13, 2023 · General Motors, LLC · 40,428 vehicles potentially affected
The problem
General Motors. LLC (GM) is recalling certain 2019-2023 Chevrolet 4500HD, 5500HD, and 6500HD Medium-Duty trucks. The brake pressure sensor assembly may leak brake fluid into the brake pressure switch and cause an electrical short-circuit.
The risk
An electrical short in the brake pressure switch can overheat the circuit and increase the risk of a fire while driving or parked.
The fix
Owners are advised to park outside and away from structures until the recall repair is complete. Dealers will replace the master cylinder pressure sensor and inspect the wire harness, replacing it, if necessary, free of charge. Owner notification letters were mailed July 11, 2023. Owners may contact Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N222375270.
Equipment
NHTSA campaign 22V874000 · reported November 23, 2022 · General Motors, LLC · 5,861 vehicles potentially affected
The problem
General Motors, LLC (GM) is recalling certain 2021-2022 Chevrolet 4500HD/5500HD/6500HD vehicles. The hex flange lock nuts used in the suspension and steering joints, were improperly heat treated and may break.
The risk
Broken hex flange lock nuts may cause a loss of tension, leading to steering instability, and increasing the risk of a crash.
The fix
Dealers will replace the hex flange lock nuts as necessary, free of charge. Interim owner notification letters informing owners of the safety risk were mailed December 27, 2022. Owner notification letters were mailed February 10, 2023. Owners may contact Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N222391080.
Most reported problems
Areas named in owner complaints to NHTSA. One complaint can name several areas.
Engine1
What owners report
Recent complaints filed with NHTSA, shortened. These are unverified accounts from owners, not findings.
May 2, 2023 · Engine · 37,632 miles · fire reported
The contact owned a 2021 Chevrolet Silverado 4500HD. The contact stated while the vehicle was parked, the contact noticed that the front end of the vehicle under the hood was in flames. The fire department was able to extinguish the fire. No police report was filed. No one was injured. The vehicle was towed to the…
Yes. NHTSA lists 2 recalls for the 2021 Chevrolet 4500HD, the most recent reported on April 13, 2023 (Service brakes, hydraulic). Check a specific car by its VIN at nhtsa.gov/recalls.
What are the most common problems with the 2021 Chevrolet 4500HD?
Owners have filed 1 complaint with NHTSA. The most frequently reported area is engine (1 complaints).
How many 2021 Chevrolet 4500HD complaints mention a crash or fire?
0 of 1 complaints report a crash and 1 a fire; 0 injuries were reported in total. Complaints are unverified reports from owners.
Source: NHTSA recall and complaint data, updated October 27, 2026. Latest complaint received May 2, 2023.