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 RepairsControl Solenoid Valve and Transmission Control Module Assembly Inspection Automatic Transmission Unit
Verify the conditions listed below do not exist. Carefully inspect the control solenoidvalve assembly connectors and pins-(1, 2, 4, 6) for the condition. Repair or replaceas necessary.DamageBent pinsDebrisBroken retaining tabContaminationVerify there is no metallic debris inside the connectors near ...