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Installation Procedure

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    Fig 1: Locating Oil Cooler Hose Bracket & Adapter Bolts
    GM1702200Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

  1. If equipped with RPO LY6 (6.0L) engine, perform the following:
    1. Install the oil cooler hose assembly and a NEW gasket.
    2. Install the oil cooler hose adapter bolts (2).

      Tighten 

      Tighten the bolts to 12 N.m (106 lb in).

    3. Install the oil cooler hose bracket bolt.

      Tighten 

      Tighten the bolt to 25 N.m (18 lb ft).

    2. Fig 2: Locating Oil Cooler Hose Bracket & Adapter Bolts
    GM1702199Courtesy of GENERAL MOTORS COMPANY
  2. If equipped with a RPO L76 (6.0L) engine, perform the following.
    1. Install the oil cooler hose assembly and a NEW gasket.
    2. Install the oil cooler hose adapter bolts (2).

      Tighten 

      Tighten the bolts to 12 N.m (106 lb in).

    3. Install the oil cooler hose bracket bolt (1).

      Tighten 

      Tighten the bolt to 25 N.m (18 lb ft).

    3. Fig 3: View Of Differential Carrier Bolts
    GM1698068Courtesy of GENERAL MOTORS COMPANY
  3. For 2500 series vehicles, raise the differential carrier into position.
  4. Install the differential carrier left side upper bolt and nut until snug.
  5. Install the differential carrier left side lower bolt and nut until snug.
  6. Install the differential carrier right side nuts.

    Tighten 

    Tighten the bolt to 100 N.m (74 lb ft).

    7. Fig 4: Locating Differential Carrier Nuts
    GM1698067Courtesy of GENERAL MOTORS COMPANY
  7. For 1500 series vehicles, raise the differential carrier into position.
  8. Install the differential carrier right side nuts.
  9. Install the differential carrier left side bolts.

    Tighten 

    Tighten the bolts/nuts to 100 N.m (74 lb ft).

  10. If equipped, install the engine protection shield. Refer to Engine Shield Replacement .
  11. Remove the jack or utility stand from the rear of the vehicle.
  12. Lower the vehicle.
    13. Fig 5: View Of Oil Cooler Hoses & Clips
    GM1702526Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • Ensure the oil cooler line being installed has a plastic cap on the end that connects to the quick connect fitting. If no plastic cap exists, or the plastic cap is damaged, obtain a new cap. Install the cap onto the cooler line prior cooler line installation.
    • Do not use the plastic cap in order to install the cooler line into the fitting.
  13. If equipped with RPO LY6 (6.0L) engine, install the oil cooler hoses to the clip.
    14. Fig 6: Locating Quick Connect Fitting
    GM1702524Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • Ensure the oil cooler line being installed has a plastic cap on the end that connects to the quick connect fitting. If no plastic cap exists, or the plastic cap is damaged, obtain a new cap. Install the cap onto the cooler line prior cooler line installation.
    • Do not use the plastic cap in order to install the cooler line into the fitting.
  14. If equipped with RPO L76 (6.0L) engine, perform the following:
    1. Install the oil cooler hoses to the hose clip on the fan shroud.
    2. Snap the oil cooler hose clip shut.
  15. Install the oil cooler lines to the radiator. Refer to Engine Oil Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection .
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