GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2008 🢒 Sierra Denali 🢒 Transmission/Transaxle 🢒 Automatic Transmission - Allison 🢒 Air Intake Pipe Replacement

Removal Procedure

    Object Number: 1335540 Size: SH
  1. Remove the water outlet tube. Refer to Water Outlet Tube Replacement.
  2. Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement.

    3. Important: It is not necessary to completely remove the PCV hose/pipe from the engine when removing the air intake pipe.

  3. Remove the positive crankcase ventilation (PCV) hose/pipe from the air intake pipe. Refer to Positive Crankcase Ventilation Hose/Pipe/Tube Replacement.
  4. Disconnect the engine wiring harness electrical connector from the turbocharger control solenoid valve.

    5. Object Number: 1873380 Size: SH
  5. Remove the engine wiring harness clip (1) from the bracket on the turbocharger.
  6. Reposition the turbocharger control solenoid valve wiring harness extension out of the way.

    7. Object Number: 1873381 Size: SH

    Important: The clamp for the air intake pipe uses reverse threads.

  7. Loosen the air intake pipe to turbocharger clamp (1).
  8. Remove the air intake pipe (2) from the turbocharger.

Installation Procedure

    Object Number: 1873382 Size: SH
  1. Clean the mating surfaces on the air intake pipe and the turbocharger.
  2. Align the arrow (2) on the air intake pipe to the arrow (1) on the turbocharger.

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


    Object Number: 1873381 Size: SH
  3. Install the air intake pipe (2) into the turbocharger.

    4. Important: The clamp for the air intake pipe uses reverse threads.

  4. Tighten the air intake pipe to turbocharger clamp (1).

    5. Tighten
    Tighten the clamp to 4.6 N·m (41 lb in).


    Object Number: 1873380 Size: SH
  5. Route the turbocharger control solenoid valve wiring harness extension into position.
  6. Install the engine wiring harness clip (1) to the bracket on the turbocharger.

    7. Object Number: 1335540 Size: SH
  7. Connect the engine wiring harness electrical connector to the turbocharger control solenoid valve.
  8. Install the PCV hose/pipe to the air intake pipe. Refer to Positive Crankcase Ventilation Hose/Pipe/Tube Replacement.
  9. Install the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement.
  10. Install the water outlet tube. Refer to Water Outlet Tube Replacement.