2021 GMC Sierra 1500 check engine light reports

90 NHTSA complaints describe persistent or recurring check-engine warnings on the 2021 GMC Sierra 1500 — roughly 17% of all complaints for this model year.

Check engine light reports

17%

share of complaints

64,728 mi

median mileage in check engine light reports (36 with odometer)

Components reported on this vehicle

Engine 275 Power Train 129 Electrical System 71 Engine and Engine Cooling 46 Fuel/propulsion System 33 Steering 32

Check engine light in other Sierra 1500 years

2026 Sierra 1500	5
2025 Sierra 1500	7
2024 Sierra 1500	23
2023 Sierra 1500	35
2022 Sierra 1500	47
2020 Sierra 1500	56
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 2021 GMC Sierra 1500

Loss of power 41 Vibration / shaking 34 Stalling 32 Clunking / rattling 25 Misfire / rough idle 20 Oil consumption 13 Hesitation / surging 12

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 2021 GMC Sierra 1500 report before drawing conclusions.

Check engine light across all vehicles →