2021 Chevrolet 5500hd problems, complaints & recalls
Most-reported problem areas: Service Brakes (1)
Safety recalls (2)
Service Brakes, Hydraulic 2023-04-13 · campaign 23V266000 · 40,428 vehicles ⚠ PARK OUTSIDE
Defect: 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.
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 2022-11-23 · campaign 22V874000 · 5,861 vehicles
Defect: 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.
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.
Service bulletins (313)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Unknown Or Other 2026-09-26 · PIT5698F · Service Bulletin/Repair Instructions
this pi provides diagnostics tips on how the lin bus works and how to diagnosis it.
Unknown Or Other 2026-09-04 · PIP4902W · Service Bulletin/Repair Instructions
this preliminary information advises a dealer on how to email gds2 session logs into technical assistance.
Unknown Or Other 2026-08-20 · PIC6551C · Service Bulletin/Repair Instructions
this preliminary information communicates to dealer to perform a mec reset for wireless projection issues
Unknown Or Other 2026-07-21 · PIT5099J · Service Bulletin/Repair Instructions
pi to help diagnose a/c concern
Unknown Or Other 2026-06-23 · PIT5966F · Service Bulletin/Repair Instructions
this preliminary information communicates an issue with an ota pending message still displayed after an ota event and how to reset/clear the message.
Unknown Or Other 2026-05-11 · PIC6423A · Service Bulletin/Repair Instructions
pi created to provide gm dealers with information on gathering information for projection issue
Showing the 6 most recent of 313 bulletins. Search all of them free at nhtsa.gov.
What owners report
2026-10-25 · Service Brakes“the truck has under 13,000 miles as of october 2026. the brake lines are all completely rusted and some rusted all the way through causing brake leaking and brake loss. this is a complete failure on gm parts by using sub par parts. i was alerted by the stabiltrak and brake light on dash to the issue. took to my gm dealer sapaugh gm, they made vid…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.