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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1449 (Automatic Transmission - 4L60-E/4L65-E (Introduction, Service & Replacement)) >> Repair Instructions >> Valve Body and Pressure Switch Replacement >> Removal Procedure

Removal Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Identifying Valve Body Electrical Components
    GM669475Courtesy of GENERAL MOTORS CORP.
  1. Ensure that removal of the valve body is necessary before proceeding.
      IMPORTANT: The following components can be serviced without removing the valve body from the transmission:
    • The torque converter clutch solenoid (1)
    • The pressure control solenoid (2)
    • The internal wiring harness (3)
    • The 2-3 shift solenoid (4)
    • The 1-2 shift solenoid (5)
    • The transmission fluid pressure manual valve position switch (6)
    • The 3-2 shift solenoid (7)
    • The torque converter clutch pulse width modulation (TCC PWM) solenoid (8)
  2. Remove the fluid level indicator.
  3. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  4. Remove the oil pan, gasket, and filter. Refer to Automatic Transmission Fluid/Filter Replacement  .
    5. Fig 2: Identifying Valve Body Electrical Connections
    GM181573Courtesy of GENERAL MOTORS CORP.
  5. Disconnect the internal wiring harness electrical connectors from the following components:
    • The transmission fluid pressure manual valve position switch (1)
    • The 1-2 shift solenoid (2)
    • The 2-3 shift solenoid (3)
    • The pressure control solenoid (4)
    • The TCC PWM solenoid (5)
    • The 3-2 shift solenoid (6)
    6. Fig 3: Fluid Indicator Stop Bracket & Bolt
    GM670310Courtesy of GENERAL MOTORS CORP.
  6. Remove the fluid indicator stop bracket bolt (2).
  7. Remove the fluid indicator bracket (1).
    8. Fig 4: View Of TCC PWM Solenoid & Retainer
    GM670428Courtesy of GENERAL MOTORS CORP.
  8. Remove the TCC PWM solenoid retainer (2) with a small screwdriver. Rotate the solenoid (1) in the bore, if necessary, until the flat part of the retainer (2) is visible.
  9. Remove the TCC PWM solenoid (1) in order to access the TCC solenoid retaining bolts.
    10. Fig 5: View Of TCC Solenoid Retaining Bolts
    GM670430Courtesy of GENERAL MOTORS CORP.
  10. Remove the TCC solenoid retaining bolts.
    11. Fig 6: View Of TCC Solenoid & Wiring Harness
    GM71463Courtesy of GENERAL MOTORS CORP.
  11. Remove the TCC solenoid (with O-ring seal) and wiring harness from the control valve body.
  12. Reposition the harness to the side of the transmission case.
    13. Fig 7: View Of Transmission Fluid Pressure Switch & Bolts
    GM29454Courtesy of GENERAL MOTORS CORP.
  13. Remove the control valve body bolts which retain the transmission fluid pressure switch to the control valve body.
  14. Remove the transmission fluid pressure switch.
    15. Fig 8: Inspecting The Transmission Fluid Pressure Switch
    GM8889Courtesy of GENERAL MOTORS CORP.
  15. Inspect the transmission fluid pressure switch for damage or debris.
    16. Fig 9: Identifying Manual Detent Spring
    GM71461Courtesy of GENERAL MOTORS CORP.
  16. Remove the manual detent spring retaining bolt.
  17. Remove the manual detent spring.
  18. Inspect the manual detent spring for cracks or damage.
    19. IMPORTANT: Keep the control valve body level when lowering it from the vehicle. This will prevent the loss of checkballs located in the control valve body passages.
  19. Remove the remaining control valve body bolts.
    20. Fig 10: View Of Valve Body To Transmission Case
    GM678315Courtesy of GENERAL MOTORS CORP.
  20. Carefully begin to lower the control valve body down from the transmission case while simultaneously disconnecting the manual valve link.
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