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HOMESERVICE MANUALSCHEVROLET2001CHEVY EXPRESS G2500, VAN PASSENGER EXTENDED, 5.0 MREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 193 (AUTOMATIC TRANSMISSION SERVICING)REMOVAL & INSTALLATIONACCUMULATOR ASSEMBLYREMOVAL
2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 M

Accumulator Assembly: Removal

2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 MSECTION Removal
WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Raise and support the vehicle.
  2. Remove the transmission oil pan and filter. See DRAINING & REFILLING  under LUBRICATION.
    NOTE: The 1-2 accumulator can be removed without removing the control valve assembly.
  3. Remove the control valve body. See VALVE BODY & PRESSURE SWITCH .
  4. Remove the accumulator cover retaining bolts. See Fig 1.
  5. Remove the 1-2 accumulator cover assembly.
  6. Disassemble the 1-2 accumulator as follows:
    1. Blow compressed air into the 1-2 accumulator cover, as shown, to remove the 1-2 accumulator piston. See Fig 2.
    2. Remove the 1-2 accumulator inner and outer springs.
  7. Inspect the 1-2 accumulator inner and outer springs for cracks.
  8. Remove the 1-2 accumulator piston seal (1) from the 1-2 accumulator piston. See Fig 3.
  9. Inspect the 1-2 accumulator piston for the following defects:
    • Porosity.
    • Cracks.
    • Scoring.
    • Nicks and scratches.
  10. Inspect the 1-2 accumulator cover for the following defects:
    • Porosity. See Fig 4.
    • Cracks.
    • Scoring.
    • Nicks and scratches.
  11. Remove the spacer plate support retaining bolts. See Fig 5.
    NOTE: Use care not to drop the following items that will be removed along with the spacer plate:
    • No. 1 checkball.
    • 3-4 accumulator spring.
    • 3-4 accumulator pin.
  12. Remove the spacer plate support. See Fig 6.
  13. Remove the spacer plate to valve body gasket, the spacer plate and the spacer plate to transmission case gasket.
  14. Remove the 3-4 accumulator piston (2). See Fig 7.
  15. Inspect the 3-4 accumulator spring for cracks.
  16. Remove the 3-4 accumulator piston seal (1) from the 3-4 accumulator piston. See Fig 3.
  17. Inspect the 3-4 accumulator piston for the following defects:
    • Porosity.
    • Cracks.
    • Scoring.
    • Nicks and scratches.
Fig 1: Removing & Installing Accumulator Assembly Bolts
G00057001Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

NO RELATED

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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.