2023 GMC Sierra 2500HD: Electrical System complaints
Owner-reported issue (NHTSA complaints, not a recall)
Symptoms
NHTSA has 6 owner complaints for the 2023 GMC Sierra 2500HD that list the electrical system component. Complaints are individual owner reports, not verified defects.
Examples:
- NHTSA complaint ODI #11770888 (filed 10/13/2026): “The contact works for a company that owns a 2023 gmc sierra 2500. the contact stated that the vehicle experienced intermittent electrical failures. while driving, the vehicle stalled upon acceleration, followed by a total loss of electrical power. the vehicle was towed to a dealer for inspection; ho…”
- NHTSA complaint ODI #11748895 (filed 07/07/2026): “On xxx, i was towing my camper to copper center, alaska from palmer, alaska when my truck experienced a full transmission shut down which put the truck into "reduced power mode". we descending down the road right next to victory bible camp (64741 victory rd, sutton-alpine, ak 99674) when the exhaust…”
- NHTSA complaint ODI #11723343 (filed 03/10/2026): “The contact owns a 2023 gmc sierra 2500. the contact stated that on several occasions, after the vehicle had been parked for approximately two days, the vehicle failed to start. the vehicle was jump-started and taken to a dealer three times, where it was diagnosed and determined that the battery nee…”
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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