Installation Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Install the exhaust manifold pipe bracket.
NOTE: Refer to Fastener Notice in Cautions and Notices.
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).

Fig 1: Exhaust Pipe Hanger Bracket (6.0L and 8.1L Engines, 6-Speed Manual Transmission)
Courtesy of GENERAL MOTORS CORP.

Fig 2: Exhaust Pipe Hanger Bracket (6.6L, and 8.1L Engines, Allison Transmission)

GM694239

Courtesy of GENERAL MOTORS CORP.

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).

Fig 3: Exhaust Pipe Hanger Bracket (6.0L, 5-Speed Manual Transmission)

GM665098

Courtesy of GENERAL MOTORS CORP.

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).

Fig 4: Exhaust Pipe Hanger Bracket (6.0L, 6.6L, and 8.1L Engines With 5-Speed Manual Transmission)

GM665095

Courtesy of GENERAL MOTORS CORP.

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).

Fig 5: Exhaust Pipe Hanger Bracket And Bolts (6.0L, 6.6L, and 8.1L Engines, 4L80-E Automatic Transmission)

GM665094

Courtesy of GENERAL MOTORS CORP.

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).

Fig 6: Exhaust Pipe Hanger Bracket (6.0L, 4L80-E Automatic Transmission)

GM665092

Courtesy of GENERAL MOTORS CORP.

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).

Fig 7: View Of Heat Shield/Exhaust Pipe Hanger Bracket & Bolts

GM858548

Courtesy of GENERAL MOTORS CORP.

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).
Install the catalytic converter. Refer to Catalytic Converter Replacement (4.3L, 4.8L, and 5.3L Engines) or Catalytic Converter Replacement (6.0L and 8.1L Engines) or Catalytic Converter Replacement (6.6L Engine) .
Install the exhaust manifold pipe. Refer to Exhaust Manifold Pipe Replacement (6.0L, 6.6L, and 8.1L Engines) .