Exhaust Hanger Mounting Bracket Replacement 6.0L, 6.6L, and 8.1L Engines

1. Remove the exhaust manifold pipe. Refer to Exhaust Manifold Pipe Replacement .
2. Remove the catalytic converter. Refer to Catalytic Converter Replacement .
3. If equipped with a 4L60-E automatic transmission, remove the exhaust pipe hanger bracket bolts.



4. If equipped with a 6.0L engine and a 4L80-E automatic transmission, remove the exhaust pipe hanger bracket bolts.



5. If equipped with a 6.0L, or 8.1L engine and a 4L80-E automatic transmission, remove the exhaust pipe hanger bracket bolts.



6. If equipped with a 6.0L engine and a 5-speed manual transmission, remove the transmission bolts.



7. If equipped with a 6.0L engine and a 5-speed manual transmission, remove the exhaust pipe hanger bracket bolts.



8. If equipped with a 6.6L or 8.1L engine and a Allison transmission, remove the exhaust pipe hanger bracket bolts.



9. If equipped with a 6.6L or 8.1L engine and a 6-speed manual transmission, remove the exhaust pipe hanger bracket bolts.
10. Remove the exhaust manifold pipe bracket.

1. Install the exhaust manifold pipe bracket.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

2. If equipped with a 6.6L or 8.1L engine and a 6-speed manual transmission, install the exhaust pipe hanger bracket bolts.

Tighten
Tighten the bolts to 12 N·m (106 lb in).




3. If equipped with a 6.6L or 8.1L engine and a Allison transmission, install the exhaust pipe hanger bracket bolts.

Tighten
Tighten the bolts to 12 N·m (106 lb in).




4. If equipped with a 6.0L engine and a 5-speed manual transmission, install the exhaust pipe hanger bracket bolts.

Tighten
Tighten the bolts to 12 N·m (106 lb in).




5. If equipped with a 6.0L engine and a 5-speed manual transmission, install the transmission bolts.

Tighten
Tighten the bolts to 100 N·m (74 lb ft).




6. If equipped with a 6.0L or 8.1L engine and a 4L80-E automatic transmission, install the exhaust pipe hanger bracket bolts.

Tighten
Tighten the bolts to 12 N·m (106 lb in).




7. If equipped with a 6.0L engine and a 4L80-E automatic transmission, install the exhaust pipe hanger bracket bolts.

Tighten
Tighten the bolts to 12 N·m (106 lb in).




8. If equipped with a 4L60-E automatic transmission, install the exhaust pipe hanger bracket bolts.

Tighten
Tighten the bolts to 17 N·m (13 lb ft).

9. Install the catalytic converter. Refer to Catalytic Converter Replacement .
10. Install the exhaust manifold pipe. Refer to Exhaust Manifold Pipe Replacement .