#18186: CSP – High Feature V6 Gen 1 Broken Piston Oil Control Ring – (Jun 15, 2018)
||All involved vehicles that are in dealer inventory must be held and not delivered to customers, dealer traded, or used for demonstration purposes until the repair contained in this bulletin has been performed on the vehicle.
This program is in effect until June 30, 2020.
Involved vehicles are marked “open” on the Investigate Vehicle History screen in GM Global Warranty Management system. This site should always be checked to confirm vehicle involvement prior to beginning any required inspections and/or repairs.
||Certain 2018 model year Buick Enclave, Chevrolet Impala and Chevrolet Traverse vehicles, equipped with a 3.6L engine (RPO LFX or LFY), may have a condition where the piston oil control ring may have been damaged during installation. If this happened, it could lead to excess oil consumption in the combustion chamber and result in an engine misfire, a check engine light, and low oil levels. If the vehicle continues to be driven with an insufficient oil level, the engine could be severely damaged and the vehicle could lose propulsion.
||Dealers are to inspect cylinders 2, 4, and 6. If, during inspection, the technician sees evidence of cylinder wall scoring, (gouges), or a broken oil control ring is found, dealers are to replace the engine.