K 3500 Truck 4WD V8-6.6L DSL Turbo VIN 1 (2001)
1. If equipped with a 6.0L or 8.1L engine, and the muffler was replaced re-install the old oxygen sensor.
2. Apply anti-seize compound GM P/N 12377953 or equivalent to the threads of the old oxygen sensor.
Notice: Refer to Fastener Notice in Service Precautions.
3. Install the oxygen sensor.
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Tighten the oxygen sensor to 42 Nm (31 ft. lbs.).
Important: Apply lubricant to the insulators to aid in installation.
4. If equipped with a 6.6L engine, install the insulators to the muffler hangers.
5. Install a new exhaust muffler gasket.
6. With the aid of an assistant, slide the muffler forward in order to install the muffler to the exhaust muffler pipe.
7. Install the insulators to the frame hangers.
Important: Apply lubricant to the insulators to aid in installation.
8. If equipped with a 6.0L engine, with RPO Y91, install the insulators to the muffler hangers.
9. Install a new exhaust muffler gasket.
