2007 GMC Sierra 3500 Classic Exhaust Heat Shield

The proper way is to remove the heated oxygen sensor (HO2S), the right wheelhouse liner, the spark plug wires, the oil level indicator tube from the engine block, the Exhaust Manifold gasket, and the exhaust manifold seal.

The proper way is to remove the spare tire, the rear axle vent hose from the rear axle, the rear shock absorber lower bolts and nuts, the catalytic converter to Muffler nuts, the insulator from the tailpipe hanger, and the muffler assembly.

The procedure is to remove the exhaust manifold pipe and the left catalytic converter if equipped with a 6.0L engine, the catalytic converter if equipped with a 6.6L engine, and the Exhaust Pipe hanger bracket bolts and bracket.