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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 834 (Automatic Transmission - 4L80-E/4L85-E (Service & Replacement)) >> Repair Instructions >> Pressure Regulator Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2003 GMC Yukon XL, 2003 Chevrolet Suburban, and 2003 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
  1. Raise and suitably support the vehicle. Refer to LIFTING AND JACKING THE VEHICLE in General Information.
  2. Remove the transmission filter. Refer to AUTOMATIC TRANSMISSION FLUID/FILTER REPLACEMENT  .
    CAUTION: Valve springs can be tightly compressed. Use care when removing retainers and plugs. Personal injury could result.
  3. Remove the reverse boost valve bushing retainer ring (2).
    Fig 1: Removing Reverse Boost Valve Bushing Retainer Ring
    G02112246Courtesy of GENERAL MOTORS CORP.
  4. Remove the following from the reverse boost valve cylinder:
    • The reverse boost valve bushing
    • The reverse boost valve
    • The pressure regulator spring retainer
    • The pressure regulator spring
    • The pressure regulator valve
    • The reverse boost valve bushing
    Fig 2: Removing Reverse Boost Valve Cylinder & Components
    G02112247Courtesy of GENERAL MOTORS CORP.
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