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 RepairsValve Lifter Removal - Right Side
Important:Do not stroke/cycle the stationary hydraulic lash adjusterplunger without oil in the lower pressure chamber.Do not allow the stationary hydraulic lash adjuster to tipover, plunger down, after the oil fill.Remove the valve lifters (SHLAs) from the cylinder head. Ifthe lifters are to be reus ...