K 2500 Truck 4WD V8-8.1L VIN G (2001)
5. If equipped with a 4.3L, 4.8L, or 5.3L engine, perform the following:
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Unclip the oxygen sensor electrical connector from the hose clip.
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Disconnect the CPA retainer.
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Disconnect the oxygen sensor electrical connector (1).
6. If equipped with a 6.0L or 8.1L engine, perform the following:
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Disconnect the CPA retainer.
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Disconnect the oxygen sensor electrical connector.
7. Support the catalytic converter or exhaust manifold pipe with adjustable jackstands.
8. If equipped with a 4.3L, 4.8L, or 5.3L engine, remove the left exhaust manifold pipe nuts.