NHTSA Complaint #11710921 — 2021 CHEVROLET SUBURBAN

ENGINE issue reported to NHTSA

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Complaint Details

ODI Number	11710921
Vehicle	2021 CHEVROLET SUBURBAN
Component	ENGINE
Date of Incident	March 5, 2025
Date Filed	January 14, 2026
Mileage	N/A miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	VA

Consumer Description

Engine is running low on oil all the time. took it to dealer they said, there is sludge build up. Found oil fouling on CYL 3 and and found Spark plugs with excessive oil no external leaks found recommend new engine

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