The 2021 Chevrolet Silverado 6500 has 1 NHTSA recall campaign affecting an estimated 62,468 vehicles. Recall repairs are always free at any authorized dealer. Owners have filed 3 complaints with NHTSA, most often about the service brakes. Last updated July 5, 2026.
Recall campaigns
SERVICE BRAKES, HYDRAULIC25V3900002025-06-1262,468 affected
Defect
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.
Consequence
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…
Complaints by component
SERVICE BRAKES
2
EXTERIOR LIGHTING
1
Total complaints3
What owners report
Verbatim reports filed with NHTSA, lightly edited for readability and with personal
information removed.
“See attached document for complaint.”
“Brake line fitting leaking at the main line pressure fitting. This caused brake fluid to leak out and loss of brakes occured.”
“Brake line fitting leaking at the main line pressure fitting. This caused brake fluid to leak out and loss of brakes occured.”
Recall, complaint, and investigation records from official NHTSA datasets (FLAT_RCL,
FLAT_CMPL, FLAT_INV), synced weekly. Counts reflect NHTSA records for the 2021 Chevrolet Silverado 6500 as of
July 5, 2026. Complaint narratives are consumer-submitted and unverified. This page
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