GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Caution: In order to avoid being burned, do not service the exhaust system while it is still hot. Service the system when it is cool.

Caution: Always wear protective goggles and gloves when removing exhaust parts as falling rust and sharp edges from worn exhaust components could result in serious personal injury.


    Object Number: 550693  Size: SH
  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Remove the catalytic converter hanger bolts.
  3. Remove the catalytic converter hanger.

  4. Object Number: 550682  Size: SH
  5. Loosen the exhaust manifold pipe nuts (1) (left side).

  6. Object Number: 550687  Size: SH
  7. Loosen the exhaust manifold pipe nuts (1) (right side).

  8. Object Number: 550700  Size: SH
  9. Remove the catalytic converter nuts (1) (left side).

  10. Object Number: 550702  Size: SH
  11. Remove the catalytic converter nuts (1) (right side).
  12. Slide the crossover pipe rearward.
  13. Remove the crossover pipe off the studs on the left and right catalytic converters.
  14. Slide the crossover pipe out of the exhaust muffler.

Installation Procedure

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.


    Object Number: 550702  Size: SH
  1. Slide the crossover pipe into the exhaust muffler.
  2. Install the crossover pipe over the studs on the left and right catalytic converters.
  3. Slide the crossover pipe forward to align the components.
  4. Notice: Refer to Fastener Notice in the Preface section.

  5. Install the catalytic converter nuts (1) (right side).
  6. Tighten
    Tighten the catalytic converter nuts (1) (right side) to 25 N·m (18 lb ft).


    Object Number: 550700  Size: SH
  7. Install the catalytic converter nuts (1) (left side).
  8. Tighten
    Tighten the catalytic converter nuts (1) (left side) to 25 N·m (18 lb ft).


    Object Number: 550687  Size: SH
  9. Tighten the exhaust manifold pipe nuts (1) (right side).
  10. Tighten
    Tighten the exhaust manifold pipe nuts (1) (right side) to 35 N·m (26 lb ft).


    Object Number: 550682  Size: SH
  11. Tighten the exhaust manifold pipe nuts (1) (left side).
  12. Tighten
    Tighten the exhaust manifold pipe nuts (1) (left side) to 35 N·m (26 lb ft).


    Object Number: 550693  Size: SH
  13. Install the catalytic converter hanger.
  14. Install the catalytic converter hanger bolts.
  15. Tighten
    Tighten the catalytic converter hanger bolts to 41 N·m (30 lb ft).

  16. Lower the vehicle.