THIS PRELIMINARY INFORMATION COMMUNICATION ADVISES THE TECHNICIAN THAT GENERATION 5 ENGINES WITH REGULAR PRODUCTION OPTION CODE L83, L86, OR LV3 MAY HAVE AN OIL CONSUMPTION CONCERN WERE ONE QUART IN 2000 MILES IS BEING USED. DEALER WILL CONFIRM OIL LEVEL WAS PROPERLY CHECKED PER OWNERÂ’S MANUAL, AND CHECK THE BOLT TORQUE ON THE VALVE LIFTER OIL MANIFOLD ASSEMBLY, BEFORE YOU CONTACTING GENERAL MOTORS PRODUCT QUALITY CENTER.
