Severe Commercial Use Vehicles Only: Lubricate chassis components every 5 000 km/3,000mi.Have underbody flushing service performed. See "Underbody Maintenance" inExterior Care.
Power Mode Description and Operation
GMLAN and Media Oriented Systems Transport (MOST) Wiring RepairsImmobilizer System Component Programming Immobilizer
This procedure will learn the immobilizer function. If the battery voltage is low,charge the battery before proceeding with the learn. If the body control module (BCM)or engine control module (ECM) have been replaced, they must be programmed beforeperforming this learn procedure.Depending on the imm ...