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Oil Cooler Lines (4WD): Installation

WARNING: This page does not describe the selected car, but rather 55 other vehicles, including the 1999 Oldsmobile Bravada, 1999 GMC Yukon, 1999 GMC Suburban, 1999 GMC Sonoma, and 1999 GMC Sierra. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install new seals on both ends of each remote engine oil filter line.
  2. Install the bolt attaching the remote engine oil filter lines to the remote engine oil filter lines (engine mounted) adapter. Tighten the bolt to 26 ft lbs. (35 N.m).
  3. Install the bolt attaching the remote engine oil filter lines to the remote (frame mounted) engine oil filter adapter. Tighten the bolt to 26 ft lbs. (35 N.m).
  4. Install the remote engine oil filter lines support clamp bolt. Tighten the bolt to 10 N.m (89 INCH lbs).
  5. Install new seals to the engine oil cooler lines at the remote (frame mounted) engine oil filter adapter.
  6. Install the bolt attaching the engine oil cooler lines to the remote (frame mounted) engine oil filter adapter. Tighten the attaching bolt to 35 N.m (26 ft lbs).
  7. When performing the following procedure, do not reuse the old retaining rings. Replace the old retaining rings with NEW ones. Do not install the NEW retaining ring onto the connector by pushing the retaining ring down over the connector.
  8. Install a new retaining ring (E-clip) into each quick connector at the radiator engine oil cooler inlet and outlet by following the next 3 steps.
  9. Hook one of the open ends of the retaining ring in one of the slots in the quick connector. See Fig 8. Rotate the retaining ring around the connector until the retaining ring is positioned with all 3 ears through the 3 slots. See Fig 9.
  10. Ensure the 3 retaining ring ears can be seen from the inside of the connector and the retaining ring can move freely in the slots.
  11. Install the engine oil cooler lines into the quick connectors at the radiator engine oil cooler inlet and outlet until a click is heard or felt. Pull back on the engine oil cooler lines to ensure a proper connection.
  12. Inspect and fill the engine oil to the proper level.
  13. Start the engine and check for leaks.
Fig 1: Removing & Installing Oil Cooler Lines At Oil Cooler
G00286649Courtesy of GENERAL MOTORS CORP.
Fig 2: Removing Retainer Rings From Radiator Fittings
G00286650Courtesy of GENERAL MOTORS CORP.
Fig 3: Removing Retaining Ring From Fitting
G00286651Courtesy of GENERAL MOTORS CORP.
Fig 4: Pulling Oil Cooler Lines From Radiator
G00286652Courtesy of GENERAL MOTORS CORP.
Fig 5: Removing & Installing Support Clamp
G00286653Courtesy of GENERAL MOTORS CORP.
Fig 6: Removing & Installing Oil Filter Adapter line
G00286654Courtesy of GENERAL MOTORS CORP.
Fig 7: Removing Oil Cooler Lines & Seals At Filter Adapter
G00286655Courtesy of GENERAL MOTORS CORP.
Fig 8: Installing Retaining Ring In Fitting
G00286656Courtesy of GENERAL MOTORS CORP.
Fig 9: Rotating Fitting To Seat Retainer Ring
G00286657Courtesy of GENERAL MOTORS CORP.
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