Jul 17, 2025Engine & cooling
Emissions Code showed up on the dash display. Tried to fix the fuel filter and cleaned a sensor off and it still shows the emissions code.
NHTSA ODI 11674331
Home · 2019 GMC Sierra 2500 Hd · Complaints
What 31 owners told NHTSA about the 2019 GMC Sierra 2500 Hd
These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.
All (31)Crash / fire / injury (3)Electrical system (8)Engine (5)Brakes (4)Fuel system (3)Fuel System, Diesel (3)Engine & cooling (2)Equipment (2)Lights (2)Tires (2)Transmission & drivetrain (2)
2 of 31 complaints match · Engine & cooling · clear filters
Oct 3, 2024Engine & coolingElectrical system
The contact owns a 2019 GMC Sierra 2500. The contact stated while driving at various speeds, the vehicle lost motive power. The coolant fan seized and failed to operate as needed. There were no warning lights illuminated. The vehicle was towed to the local dealer to be diagnosed. The contact was informed that the check engine warning light was illuminated, and the knock sensor, coolant fan clutch, injector #6, and unstated wiring harness needed to be replaced. The dealer informed the contact that the parts to repair the vehicle were on back order. The vehicle was not repaired. The manufacturer was contacted and opened a case, but no additional assistance was provided. The failure mileage was approximately 87,000.
NHTSA ODI 11617810
Working with the data? Download all 31 complaints as CSV · fetched from NHTSA July 19, 2026
How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2019 GMC Sierra 2500 Hd verdict →