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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 39 (AUTOMATIC TRANSAXLE OVERHAUL & TESTING - 4T65-E)COMPONENT DISASSEMBLY & REASSEMBLYOIL PUMP ASSEMBLYDISASSEMBLY
1999 GMC Forward Control 5.7 R, Automatic

Oil Pump Assembly: Disassembly

1999 GMC Forward Control 5.7 R, AutomaticSECTION Disassembly
WARNING: This page does not describe the selected car, but rather 43 other vehicles, including the 2003 Pontiac Montana, 2003 Pontiac Grand Prix, 2003 Pontiac Bonneville, 2003 Pontiac Aztek, and 2003 Oldsmobile Silhouette. However, it is still accessible from the selected car via links, so may be relevant.

Remove oil pump cover bolt and oil pump cover. Remove pump rotor, vane rings, vanes, oil seal ring and slide "O" ring seal. Remove outer and inner oil pump prime springs, slide seal and slide seal support. Remove slide pivot pin. Remove outlet screen. See Figure.

RENDER: 1.0x

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.