GM Service Manual Online
For 1990-2009 cars only

Exhaust Pressure Differential Sensor Replacement Pickup

Removal Procedure


    Object Number: 1873482  Size: SH
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Disconnect the chassis wiring harness electrical connector (1) from the exhaust differential pressure sensor (2).

  3. Object Number: 1873483  Size: SH
  4. Reposition the exhaust differential pressure sensor pipe assembly hose clamps (3).
  5. Remove the exhaust differential pressure sensor pipe assembly hoses from the sensor.
  6. Remove the exhaust differential pressure sensor bracket bolts (1).
  7. Remove the exhaust differential pressure sensor (2).

Installation Procedure


    Object Number: 1873483  Size: SH
  1. Position the exhaust differential pressure sensor (2) to the bracket.
  2. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the exhaust differential pressure sensor bracket bolts (1).
  4. Tighten
    Tighten the bolts to 9 N·m (80 lb in).

  5. Install the exhaust differential pressure sensor pipe assembly hoses to the sensor.
  6. Position the exhaust differential pressure sensor pipe assembly hose clamps (3).

  7. Object Number: 1873482  Size: SH
  8. Connect the chassis wiring harness electrical connector (1) to the exhaust differential pressure sensor (2).
  9. Lower the vehicle.

Exhaust Pressure Differential Sensor Replacement Cab/Chassis

Removal Procedure


    Object Number: 1873482  Size: SH
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Disconnect the chassis wiring harness electrical connector (1) from the exhaust differential pressure sensor (2).

  3. Object Number: 1873483  Size: SH
  4. Reposition the exhaust differential pressure sensor pipe assembly hose clamps (3).
  5. Remove the exhaust differential pressure sensor pipe assembly hoses from the sensor.
  6. Remove the exhaust differential pressure sensor bracket bolts (1).
  7. Remove the exhaust differential pressure sensor (2).

Installation Procedure


    Object Number: 1873483  Size: SH
  1. Position the exhaust differential pressure sensor (2) to the bracket.
  2. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the exhaust differential pressure sensor bracket bolts (1).
  4. Tighten
    Tighten the bolts to 9 N·m (80 lb in).

  5. Install the exhaust differential pressure sensor pipe assembly hoses to the sensor.
  6. Position the exhaust differential pressure sensor pipe assembly hose clamps (3).

  7. Object Number: 1873482  Size: SH
  8. Connect the chassis wiring harness electrical connector (1) to the exhaust differential pressure sensor (2).
  9. Lower the vehicle.