K 3500 Truck 4WD V8-6.0L VIN U (2002)
13. If equipped with a 6.0L engine, perform the following:
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Unclip the oxygen sensor connector from the frame.
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Disconnect the CPA retainer.
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Disconnect the oxygen sensor electrical connector.
14. If equipped with a 6.0L or 8.1L engine, remove the exhaust muffler nuts.
15. Loosen the exhaust pipe clamp.
16. With the aid of an assistant, support the exhaust muffler.
17. If equipped with a 6.6L engine, remove the exhaust muffler nuts.
18. With the aid of an assistant, support the exhaust muffler.