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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 237 (Automatic Transmission - 4L80-E/4L85-E (Service & Replacement)) >> Repair Instructions >> Reverse Servo Replacement >> Removal Procedure

Removal Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 GMC Savana Special, 2003 GMC Savana Camper Special, 2003 GMC Savana, 2003 Chevrolet RV Cutaway, and 2003 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
  1. Raise the vehicle.
  2. Remove the transmission oil pan and filter. Refer to Automatic Transmission Fluid/Filter Replacement .
  3. Remove the rear servo assembly from the transmission case as follows:
    • Cover bolts (6)
    • Cover (5)
    • Cover gasket (4)
    • Bottom retaining clip (3)
    • Servo piston (2)
    • Outer ring oil seal (1)
    • Inner ring oil seal (7)
    • Accumulator piston (8)
    • Piston seal (9)
    • Washer (10)
    • Servo spring (11)
    • Servo spring retainer (12)
    • Selective pin (13)
    • Accumulator spring (14)
    Fig 1: Removing Rear Servo Assembly
    G02424520Courtesy of GENERAL MOTORS CORP.