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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 636 (AUTOMATIC TRANSMISSION - 4L60-E/4L65-E (SERVICE & REPLACEMENT))REPAIR INSTRUCTIONSPRESSURE REGULATOR REPLACEMENTREMOVAL PROCEDURE
1999 GMC Forward Control 5.7 R, Automatic

Removal Procedure

1999 GMC Forward Control 5.7 R, AutomaticSECTION Removal Procedure
WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
  1. Raise and support the vehicle. Refer to LIFTING AND JACKING THE VEHICLE in General Information.
  2. Remove the transmission oil pan and filter. Refer to AUTOMATIC TRANSMISSION FLUID/FILTER REPLACEMENT .
  3. Compress the reverse boost valve sleeve into the bore of the oil pump to release tension on the reverse boost valve retaining ring.
  4. Remove the reverse boost valve retaining ring, then slowly release tension on the reverse boost valve sleeve.
    Fig 1: Transmission Oil Pan & Filter
    G01972975Courtesy of GENERAL MOTORS CORP.
  5. Remove the reverse boost valve sleeve (5) and the reverse boost valve (4).
  6. Remove the pressure regulator isolator spring (3) and the pressure regulator valve spring (2).
  7. Remove the pressure regulator valve (1).
    Fig 2: Pressure Regulator Valve
    G01972976Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

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.