2025 GMC SIERRA 1500 — Complaint #2163909
Open-data reference.
NHTSA Complaint about VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:COMPRESSOR filed January 7, 2026
NHTSA complaint #2163909 (ODI reference 11709368) concerns a 2025 GMC SIERRA 1500 and was filed on January 7, 2026. The owner reports the failure occurred on December 12, 2025. The vehicle had 18,000 miles on the odometer at the time of the incident. The report was geocoded to Arizona based on the filer's self-reported location. The affected component is categorized as visibility:defroster/defogger/hvac system:compressor, 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 visibility:defroster/defogger/hvac system:compressor 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 2025 GMC SIERRA 1500 shows the complete component-level complaint distribution alongside any active investigations or recalls.
Complaint Description
The contact owns a 2025 GMC Sierra 1500. The contact stated that while driving at 35 MPH, there was an abnormal knocking sound coming from the engine. No warning lights were illuminated. The vehicle was towed to the dealer, where it was diagnosed with a rough idle code, and that the thermostat coolant housing had failed. The contact was provided DTC codes: B1A76 with failure Code 0X15 (pending), P05D, U0075, U0101, U0146, U020C, U0265, U1614, and U1616, and the codes were active. The vehicle was repaired. The contact picked up the vehicle from the dealer after hours, and when the contact started the vehicle, the abnormal knocking sound was still coming from the engine. No warning lights were illuminated. The contact stated that when the A/C was turned off, the abnormal sound ceased. Additionally, the contact performed the oil changes on the vehicle and noticed that the engine was consuming an excessive amount of engine oil. The contact stated that there were no oil stains on the ground
Complaint Details
| NHTSA Complaint ID | 2163909 |
| ODI Number | 11709368 |
| Date Filed | January 7, 2026 |
| Failure Date | December 12, 2025 |
| VIN | 3GTUUGEL5SG |
Source: NHTSA Vehicle Complaints Database. Component taxonomy and severity codes are standardized by NHTSA Office of Defects Investigation.
Read our methodology — how this data is sourced, computed, and verified.