GM Service Manual Online
For 1990-2009 cars only

Exhaust Manifold Replacement Left

Removal Procedure

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cable.

  2. Object Number: 42230  Size: SH
  3. Remove the two bolts attaching the left exhaust manifold to the crossover pipe.
  4. Disconnect the spark plug wires from the spark plugs.
  5. Remove the oil level indicator and the tube. Refer to Oil Level Indicator and Tube Replacement .

  6. Object Number: 35807  Size: SH
  7. Remove the exhaust manifold studs and bolts.
  8. Remove the exhaust manifold.

Installation Procedure


    Object Number: 35807  Size: SH
  1. Install the exhaust manifold to the cylinder head.
  2. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Install the exhaust manifold studs and bolts.
  4. Tighten
    Tighten the studs and bolts to 30 N·m (22 lb ft).

  5. Install the oil level indicator and the tube. Refer to Oil Level Indicator and Tube Replacement .

  6. Object Number: 42230  Size: SH
  7. Install the two bolts attaching the left exhaust manifold to the exhaust crossover pipe.
  8. Tighten
    Tighten the exhaust crossover pipe bolts to 20 N·m (15 lb ft).

  9. Connect the negative battery cable.

Exhaust Manifold Replacement Right

Removal Procedure


    Object Number: 35837  Size: SH
  1. Inspect the EGR outlet pipe for leaks, whenever the pipe is removed from the right hand exhaust manifold. If a leak exists, replace the EGR adapter.
  2. Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  3. Disconnect the negative battery cable.
  4. Disconnect the spark plug wires from the spark plugs.
  5. Remove the transmission oil level indicator. Remove the indicator tube assembly. Refer to Transmission Oil Level Indicator Replacement in Automatic Transmission.
  6. Remove the oxygen sensor electrical connector.
  7. Remove the two bolts attaching the right exhaust manifold to the crossover pipe.
  8. Raise the vehicle. Suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  9. Remove the front exhaust pipe to the exhaust manifold, and the attaching nuts.
  10. Lower the vehicle.
  11. Remove the engine lift bracket.

  12. Object Number: 36682  Size: SH
  13. Remove the exhaust manifold studs.
  14. Remove the exhaust manifold.

Installation Procedure


    Object Number: 36682  Size: SH
  1. Install the exhaust manifold to the cylinder head.
  2. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Install the exhaust manifold studs and bolts.
  4. Tighten
    Tighten the studs and the bolts to 30 N·m (22 lb ft).


    Object Number: 35837  Size: SH
  5. Install the engine lift bracket.
  6. Raise the vehicle. Suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  7. Install the front exhaust pipe to the exhaust manifold.
  8. Lower the vehicle.
  9. Install the two bolts attaching the right exhaust manifold to the crossover pipe.
  10. Tighten
    Tighten the crossover pipe bolts to 20 N·m  (15 lb ft).

  11. Install the oxygen sensor electrical connector.
  12. Install the transmission oil level indicator and the indicator tube. Refer to Transmission Oil Level Indicator Replacement in Automatic Transmission.
  13. Install the throttle cable bracket.
  14. Connect the spark plug wires to the sparkplugs.
  15. Connect the negative battery cable.