Installation Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Installing Exhaust Manifold Gasket

Courtesy of GENERAL MOTORS CORP.

Install a new exhaust manifold gasket.

Fig 2: Exhaust Manifold Bolt Tightening Sequence

Courtesy of GENERAL MOTORS CORP.

Install the exhaust manifold.

NOTE: Refer to Fastener Notice in Cautions and Notices.

With threadlock GM P/N 12345493 (Canadian P/N 10953488) on the manifold bolts, install the bolts onto the manifold.
Tighten:
1. Tighten the exhaust manifold bolts first pass in sequence to 25 N.m (18 lb. ft.).
2. Tighten the exhaust manifold bolts second pass in sequence to 25 N.m (18 lb. ft.).
3. Tighten the exhaust manifold bolts final pass in sequence to 25 N.m (18 lb. ft.).

Fig 3: Installing Exhaust Manifold Heat Shield Studs

Courtesy of GENERAL MOTORS CORP.

Install the exhaust manifold heat shield studs, if required.
Tighten: Tighten the heat shield studs to 10 N.m (89 lb in).
Install the manifold heat shield. Refer to Exhaust Manifold Heat Shield Replacement .
Raise the vehicle.

Fig 4: Installing Exhaust Pipe To Manifold

Courtesy of GENERAL MOTORS CORP.

Install the exhaust pipe to the manifold with seal and secure the pipe with the nuts.
Tighten: Tighten the exhaust pipe nuts to 50 N.m (37 lb ft).
Lower the vehicle.