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Home › GMC › 2005 › Sierra 1500 HD, 4WD › Repair and Diagnosis › External Pages › Different variant/trim › Section 8 (Engine Controls - 4.3L (Introduction)) › Repair Instructions › Distributor Overhaul › Assembly Procedure

Assembly Procedure

WARNING: This page is about a different variant/trim than selected.
IMPORTANT: Installing the driven gear 180 degrees out of alignment, or locating the rotor in the wrong holes, will cause a no-start condition. Premature engine wear or damage may result.
    Fig 1: View Of Square-Cut Hole In Vane Wheel
    GM156754Courtesy of GENERAL MOTORS CORP.
  1. Line up the square-cut hole in the vane wheel for the CMP sensor.
    2. Fig 2: View Of CMP Sensor
    GM156755Courtesy of GENERAL MOTORS CORP.
  2. Install the CMP sensor.
    3. Fig 3: View Of CMP Sensor & Screws
    GM301398Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
  3. Install NEW CMP sensor screws.

    Tighten:  Tighten the screws to 2.2 N.m (19 lb in).

    4. Fig 4: View Of Rotor Screw Holes & Locator Pin Holes
    GM156752Courtesy of GENERAL MOTORS CORP.
  4. Identify the correct rotor mounting holes:
    • At the rotor screw holes (1)
    • At the rotor locator pin holes (2)
    5. Fig 5: View Of Distributor Cap Rotor
    GM301396Courtesy of GENERAL MOTORS CORP.
  5. Install the distributor rotor according to the index marks.
  6. Install the rotor screws.

    Tighten:  Tighten the screws to 1.9 N.m (17 lb in).

    7. Fig 6: View Of Distributor Shaft Shim Washer
    GM301405Courtesy of GENERAL MOTORS CORP.
  7. Install the shim washer (1) onto the bottom of the distributor shaft.
  8. Install the tang washer.
  9. Install the round washer.
  10. Install the driven gear according to the index marks.
    11. Fig 7: View Of Gear Pre-drilled Indent Hole & Rotor Segment
    GM301395Courtesy of GENERAL MOTORS CORP.
  11. Align the rotor segment as shown for a V6 engine (1).
  12. Install the gear and align the white paint mark on the bottom stem of the distributor, with the pre-drilled indent hole in the bottom of the gear (3).
  13. Check to see If the driven gear is installed incorrectly, the dimple will be approximately 180 degrees opposite the rotor segment when it is installed in the distributor.
    14. Fig 8: Driving Out/In Roll Pin
    GM301198Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to SAFETY GLASSES CAUTION in Cautions and Notices.
  14. Support the distributor drive gear in a V-block or similar fixture.
  15. Install the roll pin with a suitable punch and hammer.
    16. Fig 9: View Of Distributor Shaft Oil Seal
    GM301419Courtesy of GENERAL MOTORS CORP.
  16. Install a NEW oil seal under the mounting flange of the distributor base.
  17. Install the distributor. Refer to Distributor Replacement .
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