The 2020 Chevrolet 4500HD has 4 recalls, the most serious being a fire risk from a leaking brake pressure sensor that can short-circuit and overheat, and a rear wheel separation risk from lug nuts that may not have been properly tightened.
Two additional chassis concerns affect the rear of the truck. The U-bolts that clamp the rear leaf springs to the axle may also have been installed without proper torque and can work loose over time, allowing the rear axle to shift out of alignment. When the axle misaligns enough, the driveshaft can separate entirely, cutting power to the rear wheels and stalling the truck while moving. These two fastener issues, the lug nuts and the U-bolt nuts, are separate problems affecting different parts of the rear axle assembly, but both carry a real crash risk if left unaddressed. On the safety equipment side, certain vehicles equipped with a dual-mode belt locking mechanism have a front seatbelt webbing defect that can prevent the belt from properly restraining an occupant in a crash, raising the risk of injury.
At a glance
What can fail
The brake pressure sensor assembly may leak brake fluid into the brake pressure switch, causing an electrical short-circuit.
What the fix does
Dealers will replace the master cylinder pressure sensor and inspect and replace the wire harness if needed, at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
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At a glance
What can fail
The nuts that secure the rear axle U-bolts may not have been tightened properly and can loosen over time, causing the rear axle to shift out of alignment.
What the fix does
Dealers will inspect the rear axle U-bolt nuts and tighten or replace them as needed to secure the axle properly.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The seat belt webbing locking mechanism may fail to properly restrain occupants due to a manufacturing defect.
What the fix does
Dealers will inspect and replace the seat belt assembly as needed at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The lug nuts securing the rear outer wheels may not have been properly tightened during installation on the rear axles.
What the fix does
Dealers will inspect the rear outer wheel lug nuts and tighten or replace them as needed, at no cost to you.
Summarized — see the official notice for exact wording, dates, and contacts.
