Installation Procedure

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of Rear Muffler Assembly Insulators

Courtesy of GENERAL MOTORS CORP.

If equipped with a 4.8L engine, perform the following steps, otherwise proceed to step 6.
Lubricate the 3 insulators where the muffler assembly hangers are inserted in order to ease installation.

NOTE: During removal or installation, do not over extend the flex couple as internal damage may occur.

With the aid of an assistant, position and install the muffler assembly.
Install the insulators (1 and 2) to the front and rear muffler assembly hangers.

Fig 2: View Of Intermediate Muffler Assembly Insulator

Courtesy of GENERAL MOTORS CORP.

Install the insulator (1) to the intermediate muffler assembly hanger.

Fig 3: View Of Front & Rear Muffler Assembly Insulators

Courtesy of GENERAL MOTORS CORP.

If equipped with a 5.3L, or a 6.0L engine, perform the following steps.
Lubricate the 3 insulators where the muffler assembly hangers are inserted in order to ease installation.
With the aid of an assistant, position and install the muffler assembly.
Install the insulators (1 and 2) to the front and rear muffler assembly hangers.

Fig 4: View Of Intermediate Muffler Assembly Insulators

Courtesy of GENERAL MOTORS CORP.

Install the insulator (1) to the intermediate muffler assembly hanger.

Fig 5: View Of Catalytic Converter To Muffler Nuts

Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to Fastener Notice .

Install the catalytic converter to exhaust muffler nuts.
Tighten: Tighten the nuts to 45 N.m (33 lb ft).
Lower the vehicle.