GM Service Manual Online
For 1990-2009 cars only

Notice: When inspecting or replacing exhaust system components, make sure there is adequate clearance from all points on the underbody to prevent overheating of the floor pan and possible damage to the passenger compartment insulation and trim materials.

Periodic maintenance of the exhaust system is not required; however, if the vehicle is raised for other service, check the general condition of the following components:

    • The Three-Way Catalytic Converter (TWC)
    • The pipes
    • The muffler

Check the complete exhaust system and nearby body areas for the following, which could permit exhaust fumes to seep into the passenger compartment:

    • Broken parts
    • Damaged parts
    • Missing parts
    • Mispositioned parts
    • Open seams
    • Holes
    • Loose connections
    • Other deterioration
        Dust or water in the rear compartment may indicate a problem in one of these areas. Any faulty areas should be corrected immediately.

The exhaust system consists (from front to rear) of the following components:

    • The exhaust manifold
    • The Warm-Up Three-Way Catalytic Converter (WU-TWC), if equipped
    • The exhaust manifold heat shield
    • The front pipe/TWC assembly
    • The resonator/muffler/tail pipe assembly

Various flexible rubber hangers suspend the system along the underside of the vehicle.