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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 >> Pressure Regulator Replacement >> Installation Procedure

Installation Procedure

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  1. Install the pressure regulator valve with J 36850  .
  2. Pre-assemble the following parts:
    • The reverse boost valve bushing
    • A new reverse boost valve
    • A new pressure regulator spring retainer
    • The added isolator pressure regulator spring
    • The pressure regulator spring
  3. Install the pre-assembled parts into the pump bore.
    Fig 1: Installing Pressure Regulator Valve & Assembling Components
    G02424506Courtesy of GENERAL MOTORS CORP.
  4. Install the reverse boost valve bushing retainer ring while holding the reverse boost valve bushing in place.

    Ensure the retainer ring (2) is in the groove.

  5. Install the transmission oil pan and the oil filter. Refer to Automatic Transmission Fluid/Filter Replacement .
  6. Lower the vehicle.
  7. Fill the transmission to the proper level with Dexron® III transmission fluid. Refer to Transmission Fluid Checking Procedure .
    Fig 2: Installing Reverse Boost Valve Bushing Retainer Ring
    G02424507Courtesy of GENERAL MOTORS CORP.
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