2018 GMC Sierra 1500 Electrical System Problems
NHTSA lists 49 Electrical System complaints for the 2018 GMC Sierra 1500, about 15% of its 321 total complaints for the year. The median mileage at failure was 9,090 miles. No related recalls are listed for this problem area.
- Electrical System complaints
- 49
- 15% of 321
- Crashes reported
- 0
- Fires reported
- 1
- Injuries reported
- 0
- Median mileage
- 9,091 mi
- Related recalls
- 0
Typical electrical symptoms owners report
- Headlights, especially the projector-style low beams, bounce or vibrate up and down when the truck drives over bumps or rough terrain, reducing visibility at night.
- Owners report headlights that jiggle constantly even on small road imperfections, leaving dark patches on the road ahead.
- Some owners describe a truck that locks itself with the engine running, or a rear window that rolls down on its own without driver input.
- One complaint describes repeated dead batteries after the truck sits for a few days, with the dealer unable to find a cause.
- One owner reported a truck losing electrical power entirely and failing to start, followed by very slow, hesitant movement once it did start.
When 2018 GMC Sierra 1500 electrical complaints were filed
First complaint Mar 14, 2018, latest Aug 26, 2026.
Electrical System recalls for the 2018 GMC Sierra 1500
No safety recalls on record for this model year.
Electrical System complaints by Sierra 1500 model year
Raw complaint counts per model year; newer years have had less time to accumulate complaints.
Frequently asked questions
- How many electrical complaints does the 2018 GMC Sierra 1500 have?
- NHTSA lists 49 Electrical System complaints for the 2018 model year, which is 15% of the 321 total complaints filed for that year.
- Is there a recall for the 2018 Sierra 1500 electrical system?
- No. The data shows no related recalls listed for the Electrical System problem area on the 2018 Sierra 1500.
- At what mileage do electrical problems usually show up?
- NHTSA complaint data shows a median mileage at failure of 9,090 miles for Electrical System issues on the 2018 Sierra 1500.
- What are the most common electrical complaints?
- Sample complaints describe headlights that bounce or vibrate over bumps, self-locking doors, a window that rolls down on its own, and batteries that repeatedly go dead after sitting.
- Were there any crashes or fires linked to these complaints?
- NHTSA data shows 0 crashes, 1 fire, and 0 injuries among the 49 Electrical System complaints for the 2018 Sierra 1500.