GM Service Manual Online
For 1990-2009 cars only

The exhaust system incorporates (in order from front to rear) an exhaust manifold rear pipe (also called a Y pipe), a catalytic converter, a resonator, an intermediate pipe, mufflers and tail pipe(s).

The exhaust system is supported at the rear of the resonator and at the rear of each muffler by rubber isolated hangers to provide proper alignment.

The heat shields are attached to the underside of the body to reflect the heat of the exhaust system away from the vehicle body.

The exhaust crossover pipe attaches to the front and rear exhaust manifolds. A joint coupling, using a round graphite impregnated seal, connects the rear exhaust manifold pipe to the inlet of the catalytic converter. The rear exhaust manifold pipe or Y pipe contains a flex joint. This joint replaces the exhaust springs commonly used with bolts that attach the rear exhaust pipe to the manifold and crossover pipe. The intermediate pipe assembly is welded to the catalytic converter outlet.

The exhaust system can be serviced by the following components:

    • Exhaust manifold downpipe to catalytic converter
    • Right muffler
    • Left muffler
    • Complete exhaust system.
        When servicing the exhaust system, consider the following:
        When replacing either muffler use J 35976 exhaust pipe cutter or equivalent to make all cuts.