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2020 GMC SIERRA 1500 — Complaint #2172377

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NHTSA Complaint about ENGINE filed February 2, 2026

NHTSA complaint #2172377 (ODI reference 11714982) concerns a 2020 GMC SIERRA 1500 and was filed on February 2, 2026. The owner reports the failure occurred on February 1, 2026. The vehicle had 87,000 miles on the odometer at the time of the incident. The report was geocoded to Florida based on the filer's self-reported location. The affected component is categorized as engine, one of NHTSA's standardized taxonomy codes used to group defect patterns across make, model, and year.

The filer flagged the following severity indicators: crash: no, fire: no, injuries: 0, fatalities: 0. No crash, fire, or fatality was associated with this report, which places it in the early-warning stream rather than the priority-review stream. Because a VIN was supplied, this complaint is tied to a specific vehicle and not just a model-year cohort.

Individual complaints are consumer-submitted and unverified by NHTSA engineers — the agency's role at this stage is to collect, index, and make them searchable. What matters for federal action is the pattern: when many owners of the same GMC SIERRA 1500 cohort independently describe similar engine failures, defect investigators have grounds to open a PE and request manufacturer data. Related filings for the same vehicle and component appear below, and the detail page for the full 2020 GMC SIERRA 1500 shows the complete component-level complaint distribution alongside any active investigations or recalls.

Vehicle
2020 GMC SIERRA 1500
Component
ENGINE
State
Florida
Mileage
87,000 mi

Complaint Description

The contact owns a 2020 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed and hauling a boat, the vehicle shook violently and made a loud banging sound. The vehicle failed to accelerate above 40 MPH. The check engine warning light was illuminated. The vehicle was towed to the dealer, and it was determined that there was a misfire in cylinder #6, and that the engine required further inspection. The vehicle was not repaired. The contact related the failure to NHTSA Action Number: EA25007 (Engine, Engine and Engine Cooling). The manufacturer was not made aware of the failure. The failure mileage was approximately 87,000.

Complaint Details

NHTSA Complaint ID 2172377
ODI Number 11714982
Date Filed February 2, 2026
Failure Date February 1, 2026
VIN 3GTP9EEL5LG

Similar ENGINE Complaints for 2020 GMC SIERRA 1500

Source: NHTSA Vehicle Complaints Database. Component taxonomy and severity codes are standardized by NHTSA Office of Defects Investigation.