See attached document for complaint.
The worst 2021 Chevrolet Silverado 6500 problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Brakes2
- Lights1
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Brakes2
- Lights1
Recalls 1
Service brakes, hydraulic: brake fluid low warning: switch/sensor/float
- What is wrong
- 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.
- 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 brake pressure switch wire harness, free of charge. Owner notification letters were mailed September 11, 2025. Owners may contact GM customer assistance number at 1‑866‑467‑9700. GM's number for this recall is N242482680. Vehicles in this recall that were previously repaired under 23V266 will need to have the new remedy completed.
Recall number 25V390000 · Recall details
Technical service bulletins for the 2021 Chevrolet Silverado 6500 443
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- This service bulletin provides information about GM Accessories
- Unknown or other
- This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it.
- This PI was created to help address the correct repair regarding a low coolant message on the DIC
- 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
- This PI instructs technicians to inspect the ground plane on MD Silverado vehicles with DTC P251A
What 2021 Chevrolet Silverado 6500 owners say
Most recent owner complaints, unedited.
brake line fitting leaking at the main line pressure fitting. this caused brake fluid to leak out and loss of brakes occured.
Compare the 2021 Chevrolet Silverado 6500
Other model years
20212024
Questions about the 2021 Chevrolet Silverado 6500
Is the 2021 Chevrolet Silverado 6500 reliable?
Owners have filed 2 complaints about the 2021 Chevrolet Silverado 6500, close to a typical Silverado 6500 model year.
What is the most common problem with the 2021 Chevrolet Silverado 6500?
Brakes, with 2 complaints. Next is lights (1).
How many recalls does the 2021 Chevrolet Silverado 6500 have?
1 recall, covering service brakes, hydraulic.
Was there a recall on the 2021 Chevrolet Silverado 6500 brakes?
Yes, 1 recall: 25V390000. Check your VIN to see if your car still needs the free repair.
VIN decoder
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