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 RepairsExhaust Manifold Removal (LAF, LEA, or LUK) Exhaust Exhaust Manifold
Remove the secondary air injection bolts-(2) andnuts-(1).Remove the secondary air injection studs-(3 and4).Remove the secondary air injection valveassembly-(1).Remove the secondary air injection gasket-(2) anddiscard.Remove the oxygen sensor-(1).Remove the exhaust manifold heat shield bolts.Remove t ...