Sierra 3500 4WD V8-6.6L DSL Turbo VIN 2 (2004)
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8. If equipped with a 6.6L engine, loosen the exhaust pipe clamp.
9. Slide the exhaust pipe clamp up onto the exhaust pipe adapter.
10. If equipped with a 6.6L engine, remove the catalytic converter.
11. Slide the catalytic converter hanger out of the exhaust pipe hanger bracket.
Installation Procedure