GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 Impala 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Secondary Air Injection Shutoff and Check Valve Replacement

Removal Procedure

    Object Number: 1844042 Size: SH
  1. Remove the exhaust crossover pipe. Refer to Exhaust Crossover Pipe Replacement.
  2. Disconnect the secondary air injection (AIR) feed tube quick connect fitting (1) from the AIR shutoff/check valve. Refer to Plastic Collar Quick Connect Fitting Service.
  3. Remove the AIR feed tube bolt (3) from the heater inlet/outlet pipe bracket.

    4. Object Number: 1847235 Size: SH
  4. Disconnect the engine wiring harness electrical connector (2) from the AIR shutoff/check valve.
  5. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle.

    6. Object Number: 1844047 Size: SH
  6. Remove the AIR shutoff/check valve nuts (1).
  7. Lower the vehicle.
  8. Remove the AIR shutoff/check valve bolts (2).
  9. Remove the AIR check valve and gasket. Discard the gasket.

Installation Procedure

    Object Number: 1844047 Size: SH
  1. Install a NEW gasket onto the AIR pipe studs.
  2. Position and install the AIR check valve.

    3. Caution: Refer to Fastener Caution in the Preface section.

  3. Install the AIR shutoff/check valve bolts (2).

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

  4. Raise and support the vehicle.
  5. Install the AIR shutoff/check valve nuts (1).

    6. Tighten
    Tighten the nuts to 10 N·m (89 lb in).


    Object Number: 1847235 Size: SH
  6. Lower the vehicle.
  7. Connect the engine wiring harness electrical connector (2) to the AIR shutoff/check valve.

    8. Object Number: 1844042 Size: SH
  8. Connect the AIR feed tube quick connect fitting (1) to the AIR shutoff/check valve. Refer to Plastic Collar Quick Connect Fitting Service.
  9. Install the AIR feed tube bolt (3) to the heater inlet/outlet pipe bracket.

    10. Tighten
    Tighten the bolt to 10 N·m (89 lb in).

  10. Install the exhaust crossover pipe. Refer to Exhaust Crossover Pipe Replacement.