2026 GMC Sierra 1500 check engine light reports

9 NHTSA complaints describe persistent or recurring check-engine warnings on the 2026 GMC Sierra 1500 — roughly 8% of all complaints for this model year.

Check engine light reports

share of complaints

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median reported incident mileage (all complaints)

Components reported on this vehicle

Engine 74 Power Train 25 Electrical System 12 Fuel/propulsion System 7 Forward Collision Avoidance 6 Steering 4

Check engine light in other Sierra 1500 years

2025 Sierra 1500	9
2024 Sierra 1500	26
2023 Sierra 1500	43
2022 Sierra 1500	53
2021 Sierra 1500	94
2020 Sierra 1500	59
2019 Sierra 1500	71
2018 Sierra 1500	15
2017 Sierra 1500	25
2016 Sierra 1500	14

Sierra 1500 check engine light by year →

Other symptoms owners describe on the 2026 GMC Sierra 1500

Loss of power 10 Stalling 8 Clunking / rattling 6 Hesitation / surging 5 Vibration / shaking 5

Symptom counts come from keyword analysis of complaint narratives. One complaint can describe several symptoms, and classification is approximate — read the underlying reports on the full 2026 GMC Sierra 1500 report before drawing conclusions.

Check engine light across all vehicles →