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 salvage lot. The vehicle was not diagnosed. The manufacturer was not contacted. The failure mileage was 37,632.
The worst 2021 Chevrolet 4500HD problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Engine1
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Engine1
Recalls 2
Service brakes, hydraulic
- What is wrong
- 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.
- Risk
- An electrical short in the brake pressure switch can overheat the circuit and increase the risk of a fire while driving or parked.
- Remedy
- 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.
Recall number 23V266000 · Recall details
Equipment
- What is wrong
- 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.
- Risk
- Broken hex flange lock nuts may cause a loss of tension, leading to steering instability, and increasing the risk of a crash.
- Remedy
- 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.
Recall number 22V874000 · Recall details
Technical service bulletins for the 2021 Chevrolet 4500HD 319
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- Unknown or other
- This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it.
- Unknown or other
- Unknown or other
- PI to help diagnose A/C concern
- Unknown or other
- Pi created to provide GM dealers with information on gathering information for projection issue
- Unknown or other
- Unknown or other
- Unknown or other
What 2021 Chevrolet 4500HD owners say
Most recent owner complaints, unedited.
Compare the 2021 Chevrolet 4500HD
Other model years
2021
Questions about the 2021 Chevrolet 4500HD
Is the 2021 Chevrolet 4500HD reliable?
Owners have filed 1 complaint about the 2021 Chevrolet 4500HD, close to a typical 4500HD model year.
What is the most common problem with the 2021 Chevrolet 4500HD?
Engine and cooling, with 1 complaint.
How many recalls does the 2021 Chevrolet 4500HD have?
2 recalls, covering service brakes, hydraulic and equipment.
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