This page covers 7 recalls and 12 owner complaints for the 2019 GMC Sierra 3500.
Complaints for the 2019 GMC Sierra 3500 are spread thin across a small number of reports, so no single system dominates clearly. On the equipment side, owners describe a rear defroster causing the rear window to shatter after emitting smoke, and a separate report covers repeated part replacements, coolant reservoir, DEF heater and pump, and a recurring injector plug issue, often surfacing after the warranty period ends. Brake and stability-related reports describe the truck losing control during wet-road driving. The one engine report involves the truck entering a reduced-power mode followed by a complete electrical shutdown while driving. A single report also describes an oil-coolant mixing failure at around 44,000 miles, though that pattern doesn't repeat across other complaints here.
12
Total Complaints
1
Crash-Related
1
Fire-Related
1
With Injuries
By System
The 2019 GMC Sierra 3500 has 7 recalls, with the most serious being roof rail airbag inflators that can rupture or shed their end caps, sending metal fragments into the cabin and raising the risk of injury.
The airbag defect covers Crew Cab configurations and affects both left and right side roof rail inflators. On the fuel system side, trucks equipped with the optional dual fuel tank can experience a collapsing rear tank that cuts off fuel transfer to the front tank, causing the engine to stall while driving. There are also two fire-related concerns tied to the optional engine block heater on trucks equipped with the 6.6-liter Duramax diesel: the heater cable or its connection terminals can develop an electrical short that may ignite a fire in the engine compartment.
At a glance
What can fail
The roof rail air bag inflator end cap may detach or the inflator sidewall may rupture, preventing the air bag from deploying properly.
What the fix does
Dealers will replace both roof rail air bag modules at no cost to you.
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Complaints are owner-reported and reflect individual experiences, not confirmed defects. They are distinct from recalls. Data sourced from the national vehicle safety complaint database. See trending complaints →
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The roof rail air bag inflator may have a loose end cap that could detach, or the inflator itself may rupture.
What the fix does
Dealers will replace both left and right roof rail air bag modules at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The end cap on either the left or right roof-rail air bag inflator may come loose, or the inflator itself may crack and rupture.
What the fix does
Dealers will replace both the left and right roof-rail air bag modules at no cost to you.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The roof-rail air bag inflator's end cap may come loose or the inflator itself may crack, affecting the left or right side of the vehicle.
What the fix does
Dealers will replace both left and right roof-rail air bag modules at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The rear fuel tank may collapse, blocking the fuel pump from moving fuel to the front tank and causing the engine to stall.
What the fix does
Dealers will inspect and replace the fuel tank and fuel pump module as needed, and install a vent hose on the rear tank.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
An electrical short circuit can develop in the engine-block heater cable or its connection terminals, potentially causing overheating or electrical failure.
What the fix does
Dealers will replace the engine-block heater and heater cord at no cost. Previously disabled heaters and those in prior recall 19V-328 will also receive replacement cords, rerouted as needed.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The engine block heater cord or its terminals may short circuit and fail, affecting certain diesel-equipped Silverado and Sierra trucks.
What the fix does
Dealers will replace the engine block heater free of charge. On some models, they will also install a rerouted heater cord.
Summarized — see the official notice for exact wording, dates, and contacts.
