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 RepairsIgnition Coil Replacement - Bank 1 Engine Control
Removal ProcedureRemove the intake manifold. Refer toIntake Manifold Replacement.Disconnect the engine wiring harness electrical connector(s) (1) from the ignitioncoil(s) (4).Remove the ignition coil bolt(s).Remove the ignition coil(s).Installation ProcedureInstall the ignition coil(s).Caution:Refer ...