Home · 2018 GMC Sierra 2500 Hd · Complaints

What 35 owners told NHTSA about the 2018 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 (35)Crash / fire / injury (2)Engine (8)Electrical system (7)Fuel system (5)Equipment (4)Lights (4)Tires (3)Transmission & drivetrain (3)Visibility & wipers (2)Backup camera & sensors (1)Fuel System, Diesel (1)

4 of 35 complaints match · Lights · clear filters

Feb 23, 2023Electrical systemLights

I have a 2018 GMC Sierra Duramax Quad-Cab and when it is connected to either my boat, stock trailer, or cargo trailer the lights and electric trailer brakes on the trailers do not work. and the chime from the "Service Trailer Brake" indicator sounds and doesn't stop until I unplug my trailer harness from my truck making it a distraction and an unsafe situation when trying to navigate through traffic(changing lanes, stopping, and other functions needed when hauling trailers). The dealership said it was a module and specified which one and so I elected to replace it myself and it wasn't the issue. I choose to do the work myself as they quoted me a price of $700.00+ to repair the problem.

NHTSA ODI 11508714

Apr 12, 2020Lights

HEADLIGHT SHAKES AND FLICKERS WHILE DRIVING OVER BUMPS IN THE ROAD. HAPPENS ON CITY STREETS AND HIGHWAYS. FLICKERING IS VERY DISTRACTING AND DRAWS ATTENTION AWAY FROM YOUR SURROUNDINGS.

NHTSA ODI 11320881

Apr 26, 2019Lights

HID HEADLIGHTS SHAKE WHEN HITTING THE SLIGHTEST BUMP IN THE ROAD. GM SAYS IT'S NORMAL AND REFUSES TO TRY TO FIX.

NHTSA ODI 11204045

Oct 16, 2018Lights

HEADLIGHTS SHAKE WHEN GOING OVER BUMPS IN HIGHWAY. ITS DISTRACTING AND IRRITATING AND TAKES YOUR ATTENTION FROM THE ROAD WHEN IT HAPPENS.

NHTSA ODI 11140670

Working with the data? Download all 35 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 2018 GMC Sierra 2500 Hd verdict →