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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1434 (Transfer Case - NVG 126-NP4) >> Repair Instructions >> Transfer Case Motor/Encoder Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2004 Oldsmobile Bravada and 2004 Buick Rainier. However, it is still accessible from the selected car via links, so may be relevant.
  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove the fuel tank shield, if equipped. Refer to Fuel Tank Shield Replacement (TrailBlazer, Envoy) or Fuel Tank Shield Replacement (TrailBlazer EXT, Envoy XL) in Frame and Underbody.
    3. Fig 1: Locating Wiring Harness Connectors
    GM1234201Courtesy of GENERAL MOTORS CORP.
  3. Disconnect the motor/encoder electrical connector (1).
    4. Fig 2: Locating Motor/Encoder And Harness Mounting Bolts
    GM743564Courtesy of GENERAL MOTORS CORP.
  4. Remove the motor/encoder mounting bolts.
    5. Fig 3: View Of Motor/Encoder Assembly
    GM743566Courtesy of GENERAL MOTORS CORP.
  5. Remove the motor/encoder assembly.
    6. IMPORTANT: When replacing the encoder rotary position sensor follow these additional steps. The rotary position sensor is circular with 3 contacts on one side and is positioned behind the motor/encoder gasket.
  6. Position the motor on a work bench.
    7. Fig 4: Removing/Installing Motor/Encoder
    GM1237683Courtesy of GENERAL MOTORS CORP.
  7. Release the 4 tabs that retain the motor/encoder gasket and remove the gasket (1).
  8. Remove the snap ring and washer retaining the motor/encoder rotary position sensor.
    9. IMPORTANT: Gently lift the rotary position sensor and wiring to disconnect it. The internal wires go to a connector within the motor housing. This internal wire connector does not have a locking tab and is easily disturbed.
  9. Lift the motor/encoder rotary position sensor (2) from the motor shaft.
  10. Disconnect the rotary position sensor (2) from the wiring harness.
    IMPORTANT: Look at the motor/encoder housing (1) where the rotary position sensor was removed from. Take note of the "Hex" in the housing where the new sensor will seat when properly installed.
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