2024 GMC Sierra 1500: Electrical System complaints
Owner-reported issue (NHTSA complaints, not a recall)
Symptoms
NHTSA has 42 owner complaints for the 2024 GMC Sierra 1500 that list the electrical system component. Complaints are individual owner reports, not verified defects.
Examples:
- NHTSA complaint ODI #11768050 (filed 09/30/2026): “At approximately 2 years, 47,000 miles i received a message that i needed to service the transmission soon. i then got a message "trailer brakes disabled service required" and another "service transmission now unable to shift soon". i brought the vehicle into my closest gm dealer and they said it …”
- NHTSA complaint ODI #11763082 (filed 09/09/2026): “While driving on a divided two lane state highway at approximately 60mph my vehicle suffered a catastrophic engine failure causing immediate loss of power in traffic at highway speeds. i had to negotiate highway traffic to steer the vehicle onto a narrow shoulder and continue under reduced power to …”
- NHTSA complaint ODI #11762555 (filed 09/07/2026): “My vehicle has experienced repeated and unresolved electrical system failures and unexpected loss of power steering assist. the problem involves multiple warning lights, module communication faults, drivability issues, and simultaneous malfunctions affecting systems including power steering, tractio…”
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.
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