YearToAvoid

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.

2018 GMC Sierra 1500 electrical system complaints: complaints filed per month4Mar 2018Feb 2020Nov 2021Jul 2022Oct 2023Nov 2024May 2025Aug 2026
49 complaints filed with NHTSA from Mar 2018 to Aug 2026; peak Jun 2022 (4).

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.

  1. 200595 (32%)
  2. 200632 (16%)
  3. 200731 (10%)
  4. 200850 (11%)
  5. 200932 (12%)
  6. 201015 (7%)
  7. 201122 (6%)
  8. 201215 (10%)
  9. 201315 (9%)
  10. 2014334 (39%)
  11. 2015216 (27%)
  12. 201663 (17%)
  13. 201767 (16%)
  14. 201849 (15%)
  15. 2019110 (16%)
  16. 202082 (17%)
  17. 202175 (13%)
  18. 202283 (14%)
  19. 202368 (14%)
  20. 202454 (15%)
  21. 202527 (23%)

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.

Sources: NHTSA Office of Defects Investigation complaint and recall databases; U.S. EPA fuel economy data; NHTSA 5-Star Safety Ratings. Complaints are unverified owner reports.

Data updated Sep 24, 2026. Read the methodology and data sources. The Complaint Index is based on NHTSA owner complaints and recalls; it is not a reliability rating.