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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 >> Forward Servo Replacement >> Installation Procedure

Installation 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. Install the following parts:
    • Piston spring (1)
    • Retainer (2)
    • Servo piston (3)
    • O-ring seal (4)
    • Forward servo piston pin (5)
    CAUTION: Refer to FASTENER NOTICE .
  2. Install the forward servo gasket, cover, and bolts.

    Tighten 

    Tighten the bolts to 24 N.m (18 lb ft).

    Fig 1: Installing Forward Servo Piston & Components
    G02424535Courtesy of GENERAL MOTORS CORP.
  3. Install the oil pan and filter. Refer to Automatic Transmission Fluid/Filter Replacement .
  4. Lower the vehicle.
  5. Fill the transmission to the proper level with Dexron® III transmission fluid. Refer to Transmission Fluid Checking Procedure .
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