2019 Chevrolet Silverado 2500HD: Electrical System complaints
Owner-reported issue (NHTSA complaints, not a recall)
Symptoms
NHTSA has 19 owner complaints for the 2019 Chevrolet Silverado 2500HD that list the electrical system component. Complaints are individual owner reports, not verified defects.
Examples:
- NHTSA complaint ODI #11755921 (filed 08/10/2026): “The brake lights do not work, the turn signals do not work, there is one tail light working at the lower right rear. front parking lights work but front turn signals so not work. the cab brake light works. the turn signal flasher works and the dashboard turn arrows work but the flasher goes to hyper…”
- NHTSA complaint ODI #11731680 (filed 04/16/2026): “The contact owns a 2019 chevrolet silverado 2500. the contact stated that while the vehicle was parked and started, the message "service trailer brake system" was displayed on the instrument panel. the vehicle was drivable even though the message was displayed. the vehicle was not diagnosed or repai…”
- NHTSA complaint ODI #11722483 (filed 03/06/2026): “I was driving down the road at approximately 55 mph when all of a sudden, my truck decelerated and a warning signal displayed on my dash indicating my speed was being forcibly reduced to approximately 30 mph. fortunately, i was on a rural road versus the interstate. i pulled over and had an obd2 r…”
Likely causes
These complaints do not establish a single root cause; read the examples above and get a diagnosis.
Fix, in plain English
No single fix is established by these reports. Check your VIN for open recalls at nhtsa.gov/recalls, ask a dealer about technical service bulletins (TSBs) or extended warranty coverage, then have the system diagnosed.
DIY difficulty: Moderate
Finding and splicing chewed wiring is doable with a multimeter and patience but can be time-consuming; harness replacement is pro work. (Our assessment.)
Cost
No sourced cost range for this issue. Get a written quote after diagnosis.
Typical parts (search links, no affiliate codes)
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