GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2001 🢒 Sonoma Pickup - 2WD 🢒 Engine 🢒 Engine Controls - 2.2L (L43) 🢒 Secondary Air Injection Manifold/Pipe Replacement

Removal Procedure
  1. Turn OFF the ignition.
  2. Remove the serpentine belt. Refer to Drive Belt Replacement in Engine Mechanical 2.2L (L43).

    3. Object Number: 605322 Size: SH
  3. Remove the front A/C compressor mounting bolts. (2)

    4. Object Number: 281146 Size: SH
  4. Remove the four rear A/C compressor to power steering (P/S) lower bracket bolts.
  5. Move the A/C compressor assembly out of the way.

    6. Object Number: 379994 Size: SH
  6. Remove the top 2 P/S bracket bolts from the cylinder head.
  7. Remove the 2 bolts holding the P/S pump to the lower bracket and remove bracket.

    8. Object Number: 641804 Size: SH
  8. Disconnect the AIR pump outlet tube from the AIR check valve.
  9. Remove the 4 attaching nuts (1) holding the AIR check valve and manifold/pipe assembly (2) to the exhaust manifold and remove the assembly.
  10. Remove the check valve from the manifold pipe (2).

Installation Procedure
  1. Install the check valve to the manifold pipe (2).

    2. Object Number: 641804 Size: SH

    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.

  2. Install the AIR check valve and manifold/pipe assembly to the exhaust manifold studs with the 4 attaching nuts. (1)

    3. Tighten
    Tighten the four nuts to 14 N·m (10 lb ft).

  3. Connect the AIR pump outlet tube to the AIR check valve.

    4. Object Number: 379994 Size: SH
  4. Install the power steering lower bracket and two attaching bolts.

    5. Tighten
    Tighten the 2 bolts to 50 N·m (37 lb ft).

  5. Install the top 2 power steering bracket bolts to the cylinder head.

    6. Tighten
    Tighten the 2 bolts to 50 N·m (37 lb ft).


    Object Number: 605322 Size: SH
  6. Move the A/C compressor into place and install the front A/C compressor bolts (2).

    7. Tighten
    Tighten the front bolts (2) to 50 N·m (37 lb ft).


    Object Number: 281146 Size: SH
  7. Install the 4 rear A/C compressor to P/S bracket bolts.

    8. Tighten
    Tighten the 4 rear bolts to 24 N·m (18 lb ft).

  8. Install the drive belt. Refer to Drive Belt Replacement in Engine Mechanical.