2025 Chevrolet Silverado 1500 Fuel System Problems
2 owner-reported fuel system complaints from NHTSA data
Data sourced from NHTSA public database. For informational purposes only. Always consult a qualified mechanic.
Owner Complaints (2)
Your check engine light and emission warning keep turning on right after you fill up with gas, but disappear before the dealership can diagnose the problem. This has happened three times across two different GM dealerships—the scanner picks up codes initially, but they vanish when technicians try to investigate further. The dealerships say this is normal, but you've found others online reporting the same issue. Fixing this may require updating your vehicle's fuel system software or replacing a faulty gas cap or fuel pressure sensor.
Parts you may need:
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Issues with DEF system. Fuel and DEF tank is filled up. Within 100 miles of towing the DEF system states DEF is empty and Speed will be limited within 500 miles. At the time the message appears on screen, fuel mileage goes from 13ish mpg to 8 mpg. Try to add DEF and only able to add close to a gallon of DEF. System has a hard time recalculating the amount of DEF in system.