Sierra 1500 4WD V8-6.0L (2007)
5. Install the insulator (1) to the intermediate muffler assembly hanger.
6. If equipped with a 5.3L, or a 6.0L engine, perform the following steps.
7. Lubricate the 3 insulators where the muffler assembly hangers are inserted in order to ease installation.
8. With the aid of an assistant, position and install the muffler assembly.
9. Install the insulators (1, 2) to the front and rear muffler assembly hangers.
