2009 Chevrolet Trailblazer Intake Manifold

First, you need to disconnect the negative battery cable, relieve the fuel pressure, remove the throttle body, and remove the powertrain control module (PCM) retaining bolts and nuts. Then, please remove the ECM, disconnect the fuel feed pipe, disconnect the integral clip, remove the engine wire harness bracket bolt, and remove the electrical harness and vacuum lines from the intake manifold. You also need to disconnect the manifold absolute pressure (MAP) sensor electrical connector, disconnect the crankcase ventilation hose from the intake manifold, and disconnect the vacuum brake booster hose at the intake manifold. Finally, you should remove the generator, loosen the intake manifold bolts and remove the intake manifold.