
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 the exhaust manifold heatshield-(1).

Remove the block heater-(1), if equipped.

Remove and discard the exhaust manifold to cylinder headretaining nuts-(1).Remove the exhaust manifold-(2).Remove the exhaust manifold gasket-(3).Clean all of the sealing surfaces.If the exhaust manifold is being replaced, transfer thefollowing parts:The exhaust manifold heat shieldThe oxygen sensor

Remove the secondary air injection pipe assemblybolts-(2).Remove the secondary air injection pipeassembly-(1).
Secondary Air Injection Check Valve Removal - Bank 2 Emissions Air Injection
Engine Coolant Thermostat Housing Removal Engine Cooling ThermostatAfterblow Enabling
The afterblow mode can be enabled using the scan tool. The afterblow mode allows theblower motor to operate after the engine has been turned off. This operation of theblower motor dries the evaporator core, which reduces the amount of microbial growthwhich can create undesirable odors.Use the follow ...