Yukon/Denali XL 1500 4WD V8-6.0L VIN U (2004)
Important: Apply lubricant to the insulators to aid in installation.
4. Install the insulators to the muffler hangers.
5. Install a new exhaust manifold pipe gasket.
6. With the aid of an assistant, slide the muffler forward in order to install the muffler to the catalytic converter.
7. Install the insulators to the frame hangers.
8. Lower the vehicle.
9. Position the NEW band clamp on the intermediate exhaust pipe, using the alignment mark created previously. The band clamp bolt must NOT be
positioned below the exhaust pipe.
10. Install the exhaust muffler nuts, until snug.
11. Tighten the exhaust pipe clamp bolt and muffler nuts.
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Tighten the nuts to 40 Nm (30 ft. lbs.).
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Tighten the clamp to 44 Nm (33 ft. lbs.).
12. If equipped with a 6.0L engine, perform the following:
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Connect the oxygen sensor electrical connector.
