GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2004 🢒 TopKick C-Series (Conventional) C4/C5 🢒 Engine 🢒 Engine Exhaust 🢒 Catalytic Converter Replacement

Removal Procedure
  1. Remove the exhaust manifold pipe. Refer to Exhaust Manifold Pipe Replacement .

    2. Object Number: 738367 Size: SH
  2. Remove the nuts from the tail pipe to the muffler clamp and remove the clamp.
  3. Remove the catalytic converter and muffler tail pipe.

Installation Procedure

    Object Number: 803392 Size: SH
  1. Install the catalytic converter muffler to the tail pipe and on hangers.

    2. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 803392 Size: SH
  2. Install the tail pipe and clamp.

    3. Tighten
    Tighten the nuts to 29 N·m (21 lb ft).

  3. Install the exhaust manifold pipe. Refer to Exhaust Manifold Pipe Replacement .
  4. Check for clearance and alignment.