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HOMESERVICE MANUALSCHEVROLET2001CHEVY EXPRESS G2500, VAN CARGO EXTENDED, 5.7 R, L31/KL8REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 107 (AUTOMATIC TRANSMISSION SERVICING)LUBRICATIONDRAINING & REFILLING
2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8

Draining & Refilling

2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8SECTION Draining & Refilling
WARNING: This page is about a different car, the 2003 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Do not use any type of grease to retain parts during the assembly of this unit. Using greases other than the recommended assembly lube changes the transaxle fluid characteristics. Using greases other than the recommended assembly lube causes undesirable shift conditions and/or filter clogging. Use Transjel(tm) (J-36850) or equivalent during the assembly of this unit.
  1. Raise and support the vehicle.
  2. Place the drain pan under the transaxle oil pan.
    NOTE: When removing the oil pan bolts, be careful not to damage the oil pan sealing surfaces. Such damage may result in oil leaks in this area.
  3. Remove the oil pan bolts from only the front and the sides.
  4. Loosen the rear oil pan bolts about 4 turns.
  5. Use a rubber mallet to lightly tap the oil pan or use a screwdriver to pry the oil pan loose.
  6. Allow the fluid to drain.
  7. Remove the remaining oil pan bolts (23). See Fig 3 .
  8. Remove the oil pan (24).
  9. Remove the oil pan gasket (25).
  10. Inspect the oil pan and the filter screen for the following foreign material:
    • Metal particles.
    • Clutch facing material.
    • Rubber particles.
    • Engine coolant.
  11. Determine the source of the contamination if foreign material is evident.
  12. Correct the source of the contamination.
  13. Inspect the oil pan flange (1) for distortion. See Fig 1 .
  14. Replace the oil pan (1) if bent or distorted. Do not attempt to straighten.
  15. Inspect the washers on the bolts when service requires the removal of the bottom oil pan.
  16. Install a new bolt and washer assembly if the washer is inverted. See Fig 2 .
  17. Use solvent to clean the case and then air dry the case.
    NOTE: Ensure the oil pan and the case flanges are dry and are free of any oil film or leakage may result.
  18. Use solvent to clean the oil pan gasket surfaces. Air dry the oil pan gasket surfaces. Ensure all traces of the old gasket material are removed.
  19. Remove the filter (100). Remove the lip ring seal (101) pressed into the case only if replacement is necessary.
  20. Inspect the oil pan and the filter for the following foreign material:
    • Metal particles.
    • Clutch facing material.
    • Rubber particles.
    • Engine coolant.
  21. Determine the source of the contamination if foreign material is evident.
  22. Correct the source of the contamination.
  23. If removed, install a new seal (101).
  24. Install the new filter (100), if required.
  25. Install the gasket (25) and the oil pan (24). See Fig 4 .
    NOTE: Oil pan gaskets are reusable. Only replace if sealing surface is damaged.
  26. Install the oil pan (24) and the gasket (25) at the same time. See Fig 3 .
  27. Install the oil pan bolts. Tighten the bolts to specification. See TORQUE SPECIFICATIONS  .
  28. Lower the vehicle.
  29. Fill the transaxle with appropriate fluid to proper level. See RECOMMENDED FLUIDS  and FLUID CAPACITIES  .
  30. Place the gear selector in the Park position.
  31. Start the engine.
  32. Run the engine at a slow idle. Do not race the engine.
  33. Inspect the transmission fluid level. See CHECKING FLUID LEVEL & CONDITION  .
  34. Inspect for proper completion of the repairs.
  35. Inspect the oil pan gasket for leaks.
Fig 1: Inspecting Oil Pan Flange
G00087723Courtesy of GENERAL MOTORS CORP.
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.