Service Manual Update for DTC B3538 and Related Oil Life Reset Switch Circuit Diagnosis on L61 and L81 Engines

The purpose of this bulletin is to provide updated diagnostic information on the oil life reset switch circuit that was omitted from all 2000 L- Series L61 Engine Service Manuals and all 2000 L- Series L81 Engine Service Manuals.

For diagnostic information on the oil life reset switch circuit, refer to the information contained in this bulletin.

Photo copies of pages 2, 3, and 4 in this bulletin should be made and inserted between following pages in all 2000 L-Series L61 Engine Service Manuals and all 2000 L-Series L81 Engine Service Manuals at your location.

L61 Engine Service Manual:

Insert photo copies of page 2, 3, and 4 in this bulletin between pages 718-719 and between pages 66-67 in all L-Series L61 Engine Service Manuals.

L81 Engine Service Manual:

Insert photo copies of page 2, 3, and in 4 in the bulletin between pages 884-885 and between pages 88-89 in all 2000 L-Series L81 Engine Service Engine Service Manuals.

The "CHANGE ENGINE OIL"tell tale is reset by pressing the oil life reset push-button switch. This switch is located in the underhood fuse block (UHFB). Pressing this switch grounds circuit 1579. When grounded, the body control module (BCM) requests the engine controller to perform an oil reset. When oil life reset is completed, the BCM will turn Off the "CHANGE ENGINE OIL"