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Home >> Chevrolet >> 2021 >> Blazer L >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Power Transfer Unit AAM) >> Repair Instructions - On Vehicle >> Power Transfer Unit Case Replacement >> Installation Procedure
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Installation Procedure

WARNING: This page is about a different variant/trim than selected.
  1. Clean the contact surfaces between the transmission and the power transfer unit case.
  2. GM5060151Courtesy of GENERAL MOTORS COMPANY

    Support the power transfer unit case with a suitable jack, and secure with suitable straps.

  3. Raise and align the power transfer unit case in the correct position in relation to the transmission.
  4. Install the wire harness to the power transfer unit.
  5. Install the power transfer unit case (1) to the transmission.
  6. GM5041045Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

    Install the 3 power transfer unit bolts (1) and tighten to 100 N.m (74 lb ft).

  7. Connect all necessary electrical connectors and wiring harness retainers.
  8. GM5628086Courtesy of GENERAL MOTORS COMPANY

    Install the secondary oxygen sensor wiring harness clip bracket (2).

  9. Install the secondary oxygen sensor wiring harness clip bolt (1) and tighten to 9 N.m (80 lb in).
  10. GM5041864Courtesy of GENERAL MOTORS COMPANY

    Connect the power transfer unit case vent hose (1) to the power transfer unit case (2).

  11. Install the transfer case bracket. Transfer Case Bracket Replacement (With LGX Engine) , or Transfer Case Bracket Replacement (With LCV Engine) 
  12. GM5041039Courtesy of GENERAL MOTORS COMPANY

    Install the power transfer unit bolt (1) and tighten to 100 N.m (74 lb ft).

  13. Install the transmission rear mount bracket. Transmission Rear Mount Bracket Replacement (All Wheel Drive)
  14. GM5041059Courtesy of GENERAL MOTORS COMPANY

    Install the power transfer unit bolt (1) and tighten to 100 N.m (74 lb ft).

  15. Install the warm up three way catalytic converter. Warm Up Three-Way Catalytic Converter Replacement (Bank 1, LGX) , or Warm Up Three-Way Catalytic Converter Replacement (LCV) , or Warm Up Three-Way Catalytic Converter Replacement (LSY) , or Warm Up Three-Way Catalytic Converter Replacement (Bank 2, LGX)
  16. Connect the two piece propeller shaft to the power transfer unit case. Two-Piece Propeller Shaft Replacement
  17. Check power transfer unit case fluid level. Approximate Fluid Capacities , and Adhesives, Fluids, Lubricants, and Sealers