The worst 2020 Chevrolet Silverado 6500 problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
Recalls 1
Service brakes, hydraulic: power assist
- What is wrong
- General Motors, LLC (GM) is recalling certain 2019-2020 Chevrolet Silverado Medium Duty 4500HD, 5500HD, and 6500HD vehicles. These vehicles were remedied under the federal safety agency Recall 25V390 with a brake jumper wire harness that was assembled without protective tape. A wiring harness that is missing protective tape can allow the wires to become damaged.
- Risk
- Damaged brake jumper wires can result in power brake assist failure, increasing the risk of a crash.
- Remedy
- Dealers will remove the installed wire harness, apply protective tape, and reinstall the wire harness, free of charge. Owner notification letters are planned to be mailed December 22, 2025. Owners may contact GM customer assistance number at 1‑866‑467‑9700. GM's number for this recall is N252531990. Vehicles in this recall were previously repaired under 25V390 and will need to have the new remedy completed. Vehicle Identification Numbers (VINs) involved in this recall became searchable on beginning November 6, 2025.
Recall number 25V768000 · Recall details
Technical service bulletins for the 2020 Chevrolet Silverado 6500 17
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.
- This PI was created to help address the correct repair regarding a low coolant message on the DIC
- Unknown or other
- PI to help diagnose A/C concern
- This PI instructs technicians to inspect the ground plane on MD Silverado vehicles with DTC P251A
- Unknown or other
- Unknown or other
- Unknown or other
- Unknown or other
Compare the 2020 Chevrolet Silverado 6500
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Questions about the 2020 Chevrolet Silverado 6500
Is the 2020 Chevrolet Silverado 6500 reliable?
Owners have filed 0 complaints about the 2020 Chevrolet Silverado 6500.
What is the most common problem with the 2020 Chevrolet Silverado 6500?
There are not enough complaints to tell.
How many recalls does the 2020 Chevrolet Silverado 6500 have?
1 recall, covering service brakes, hydraulic.
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