2019 GMC Sierra 2500 Electrical Problems

On 07/10/2026 at approximately 1:10 a.m., the parked and unoccupied vehicle caught fire while turned off. The vehicle had not been driven for several hours. A neighbor was awakened by the horn/alarm and popping noises, observed fire near the passenger-side cab/engine area, and called 911. The fire rapidly spread throughout the cab, engine compartment, rocker-panel areas, wheel wells, and truck bed, creating an explosion hazard and threatening a nearby occupied residence and garage. The fire department extinguished the blaze, but the vehicle was completely destroyed. Before the fire, the vehicle had experienced recurring coolant warnings, a DEF-system warning, and delayed starting associated with the main battery. No smoke, fuel odor, intentional ignition source, charging device, or known external fire source was present before the incident. Weather was calm. The exact failed component and cause remain UNKNOWN. A firefighter stated that the apparent fire origin was near the passenger side of the vehicle. The remains are available for inspection, subject to coordination with the vehicle owner and insurer. The incident has been reported to the fire department, insurer, manufacturer, and NHTSA.

NHTSA ID

11752275

Incident

Jul 10, 2026

UI Bulletin #161b is for years 2020 and beyond. But my 2019 is having the same exact issue and the GM dealer will not cover the work as stated in the UI Bulletin #161b

NHTSA ID

11724160

Incident

Mar 6, 2026

My center console wires for the charging pad broke and shorted out causing wires to burn and short the whole system out

NHTSA ID

11702171

Incident

Nov 26, 2025

The manufacturer placed two 12v batteries to start the truck with one being located on the passenger side just in front of the cowl of the cab. The factory OEM batteries are known to overheat when charging which is exactly what mine did and as the battery boils over with sulfuric acid, the acid is vaporized and ingested into the cabin. It’s a diesel so it’s common for me to take my dog in the rear crew cab with me and leave the engine running so the cabin will stay cool in the summer while I work my contractor job. When I let the engine idle with windows up and AC on the overcharged battery introduced the vaporized sulfuric acid into the cabin and rendered the interior deadly toxic. Luckily I was only gone from the truck for about 10 minutes but in this amount of time the acid was very bad and caused burns in my dogs throat and mine while driving home. I can only imagine if this scenario were to take place with kids left in the truck for many reasons to stay cool but could easily turn into a deadly situation. PLEASE look into this before someone or some poor animal is fatally injured or killed.

NHTSA ID

11666873

Incident

Jun 13, 2025

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 ID

11617810

Incident

Jan 1, 2024

Mileage

87,000 mi

When it rains, there are puddles of water on the passenger side! Cannot figure out how the water is getting in..my concern is of a potential electrical short/ fire / failure of a system that doesn’t allow me to operate the vehicle safely! Possibly, affecting other functions of the vehicle during operation!

NHTSA ID

11607154

Incident

Aug 6, 2024

Vehicle was last driven on June 23 2024 and parked in my driveway. On the evening of June 29 2024 my horn was blowing in my truck at around 10:30. While I was walking out to the vehicle it was in flames. The fire started from what I understand on the driver’s side behind the dash. Luckily no one was in the vehicle when it happened.

NHTSA ID

11597612

Incident

Jun 29, 2024

DEFECTIVE TRAILER BRAKE SWITCH ,WHICH POSES A RISK TO MOTOR VEHICLE SAFETY IF YOU ARE TOWING A TRAVEL TRAILER, WHERE BRAKES FAIL LOCK UP IS POSSIBLE DANGEROUS TO PULL

NHTSA ID

11533680

Incident

Jul 14, 2023

TRAILER BRAKE SYSTEM NEEDS SERVICE, WARNING LIGHT CAME ON AND BEEPING LOUD STARTER LAST MONTH 6-2023 , AND MAYBE THE BRAKE CONTROL MODULE IS BAD ? CODE C1117 CAME UP

NHTSA ID

11532294

Incident

Jul 14, 2023