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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1007 (Automatic Transmission - 4L80-E/4L85-E (Introduction, Service & Replacement)) >> Repair Instructions >> Park/Neutral Position Switch Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the PNP switch to the manual shaft by aligning the switch hub flats with the manual shaft flats.
    Fig 1: Installing The PNP Switch To The Manual Shaft
    GM1480478Courtesy of GENERAL MOTORS CORP.
  2. Slide the PNP switch onto the manual shaft until the switch mounting bracket contacts the mounting bosses on the transmission.
    3. IMPORTANT: If a new PNP switch is being installed, the switch will come with a positive assurance bracket. The positive assurance bracket aligns the new switch in its proper position for installation and the use of the park neutral switch aligner will not be necessary.
  3. Install the PNP switch bolts finger tight.
  4. Position the J 41364-A  onto the PNP switch. Ensure that the two slots on the switch where the manual shaft is inserted are lined up with the lower two tabs on the tool.
    Fig 2: Positioning The J 41364-A Onto The PNP Switch
    GM102270Courtesy of GENERAL MOTORS CORP.
    5. NOTE: Refer to Fastener Notice in Cautions and Notices.
  5. Rotate J 41364-A  until the upper locator pin on the tool is lined up with the slot on the top of the switch.

    Tighten:  Tighten the bolts to 25 N.m (18 lb ft).

  6. Remove J 41364-A  from the PNP switch. If installing a new switch, remove the positive assurance bracket at this time.
    7. Fig 3: View Of PNP Switch, Lever And Manual Shaft
    GM394471Courtesy of GENERAL MOTORS CORP.
  7. Install the control lever to the manual shaft with the nut.
  8. Install the manual shaft nut.

    Tighten:  Tighten the nut to 25 N.m (18 lb ft).

    9. Fig 4: View Of Range Selector Cable End At Transmission Range Selector Lever Ball Stud
    GM738167Courtesy of GENERAL MOTORS CORP.
  9. Install the range selector cable end (2) to the range selector lever ball stud (1).
    10. Fig 5: Connecting The PNP Switch Electrical Connector
    GM1284299Courtesy of GENERAL MOTORS CORP.
  10. Connect the PNP switch electrical connector (2).
  11. If equipped with 4WD, install the front propeller shaft. Refer to Propeller Shaft Replacement - Front in Driveline/Axle.
  12. Lower the vehicle.
  13. Check the PNP switch for proper operation. The engine must start in the park (P) or neutral (N) positions only. If proper operation of the switch can not be obtained, replace the switch.
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