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 RepairsWater Pump and Balance Shaft Chain and Tensioner Installation Engine Block Cylinder Block Balance Shaft
Caution:Refer toFastener Caution.Note:If the balance shafts are not properly timed to the engine,the engine may vibrate and make noise.Install the upper balance shaft chain guide-(1)and bolts and tighten to12-Y-(106-lb-in).Install the small balance shaft chainguide-(1).Install the balance shaft chai ...