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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 52 (Transfer Case - NVG 149-NP3 - Overhaul) >> Repair Instructions >> Cleaning and Inspection >> Oil Pump

Oil Pump

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  1. Remove the oil pump suction pipe and the oil pump suction hose from the oil pump screen.
    Fig 1: Locating Oil Pump
    GM805643Courtesy of GENERAL MOTORS CORP.
  2. Clean the pipe, hose, and screen in cleaning solvent and air dry.
  3. If the screen is embedded with debris, replace the screen.
  4. Inspect the hose for cracking or tears.
  5. Replace the hose if it is faulty.
  6. Inspect the oil pump for the gears moving freely.
  7. Replace the oil pump if there is any binding in the gears.