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HOMESERVICE MANUALSCHEVROLET2001CHEVY EXPRESS G2500, VAN CARGO EXTENDED, 5.7 R, L31/KL8REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 193 (AUTOMATIC TRANSMISSION SERVICING)REMOVAL & INSTALLATION2-4 SERVOREMOVAL
2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8

2-4 Servo: Removal

2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8SECTION 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.
NOTE: Tools required: Servo Cover Depressor (J-29714-A).
  1. Raise and support the vehicle.
  2. Remove the transmission support. See TRANSMISSION SUPPORT in REMOVAL & INSTALLATION - BLAZER, JIMMY CANADIAN, SONOMA & S10 PICKUP article.
  3. Remove the exhaust manifold pipe.
  4. Place a drain pan under the vehicle.
  5. Lower the transmission just enough to gain access to the oil cooler lines.
  6. Disconnect the oil cooler lines, if necessary, to gain access to the 2-4 servo. See OIL COOLER LINES .
  7. Remove the oil pan bolt below and to the left of the 2-4 servo cover.
  8. Install the servo cover depressor to the oil pan rail.
  9. Tighten the bolt on the servo cover depressor to compress the servo cover. See Fig 1.
  10. Remove the servo cover retaining ring. See Fig 2.
  11. Loosen the bolt on the servo cover depressor to release tension on the servo cover.
  12. Remove the servo cover and "O" ring seal. If the cover is hung up on the seal, use a pick (2) to pull and stretch the seal (1) out of the groove. Cut and remove the "O" ring seal before removing the cover. See Fig 3.
  13. Remove the 2-4 servo assembly from the transmission.
  14. Inspect the 4th apply piston, the 2-4 servo converter, 2nd apply piston, and the piston inner housing for the following defects:
    • Cracks.
    • Scoring.
    • Burrs and nicks. See Fig 4.
Fig 1: Installing Servo Cover Depressor
G92J12574Courtesy 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.