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 RepairsRelay Replacement (Within an Electrical Center) Relays
Special Tools EL-43244 Relay Puller PliersRemoval ProcedureRemove the electrical center cover.Note:Always note the orientation of the relay.If equipped with a notch style relay; observe the location of the notch on the oldrelay to verify the new relay is installed with the notch in the same location ...