GM 19420244 CONVERTER ASM,3WAY CTLTC(W/EXH PIPE)

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For 1.4L models, begin by opening the hood and removing the upstream oxygen sensor, then unscrew the converter-to-turbocharger outlet V-clamp bolt to disconnect the upper end of the catalytic converter. Discard the V-clamp and obtain a new one for installation. Raise the vehicle and support it securely on jackstands, then remove the under-vehicle splash shield. Next, remove the three nuts attaching the front portion of the exhaust pipe to the warm-up catalytic converter, applying penetrating oil beforehand and allowing it to soak. Discard the nuts and obtain new ones for installation. Remove the two converter bracket nuts and then the catalytic converter, supporting the exhaust pipe if necessary to reposition it slightly. Discard the old flange gaskets. Installation is the reverse of removal, using new gaskets at both mounting flanges, a new V-clamp, and new converter-to-exhaust pipe nuts, coating the threads with anti-seize compound and tightening to the specified torque values. For the secondary converter, raise the front of the vehicle and support it securely on jackstands, applying penetrating oil to all flange nuts. Remove the downstream oxygen sensor, then the nuts securing the front portion of the exhaust system to the muffler, followed by the secondary converter-to-warm-up converter nuts, discarding all nuts and obtaining new ones for installation. Remove the secondary converter support bolts and the converter/front exhaust pipe. Installation is the reverse of removal, ensuring the use of new gaskets and nuts, tightening the nuts to the specified torque. For 1.8L models, the catalytic converter is integrated into the exhaust manifold and cannot be serviced separately; removal or replacement requires further guidance.