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Home >> Chevrolet >> 2005 >> Astro Van Cargo, AWD >> Repair and Diagnosis >> Body & Frame >> Frames, Subframes & Crossmembers >> Frame And Underbody >> Repair Instructions >> Assist Step Replacement >> Installation Procedure

Installation Procedure

    Fig 1: Locating Assist Step To Rocker Panel Retainer Screws
    GM350694Courtesy of GENERAL MOTORS CORP.
  1. Install the assist step retainer to the rocker panel.

    The right side is a one piece retainer, the left side is a two piece retainer.

    1. Clean the rocker panel with isopropyl cleaner or equivalent to remove all of the old double backing tape.
    2. Remove the strip from the double back tape if replacing retainer.
    3. Align the assist step retainer to the holes in the rocker panel and press in place.
    2. NOTE: Refer to Fastener Notice in Cautions and Notices.
  2. Install the screws to the assist step retainer.

    Tighten:  Tighten the screws to the assist step retainer to 2 N.m (18 lb in).

    3. Fig 2: Expanded View Of Rear Anchor
    GM350698Courtesy of GENERAL MOTORS CORP.
  3. Install the nuts and bolts to the rear anchor that attaches to the inner pinchwell flange and to the inner rocker panel.

    Tighten:  Tighten the nuts and bolts to the rear anchor that attaches to the inner pinchwell flange and to the inner rocker panel to 25 N.m (18 lb ft).

    4. Fig 3: View Of Rear Assist Step Support Bracket Bolts
    GM394776Courtesy of GENERAL MOTORS CORP.
  4. Install the rear assist step support bracket.
  5. Install the nuts and bolts to the rear assist step support bracket.

    Tighten:  Tighten the nuts and bolts to rear assist step support bracket to 25 N.m (18 lb ft).

    6. Fig 4: Identifying Assist Step Support Brackets By Number
    GM350689Courtesy of GENERAL MOTORS CORP.
  6. Lay out the assist step support brackets in the order in which they were removed (1, 2, 3, 4, 5).
    7. Fig 5: Locating Assist Step Support Bracket Bolts
    GM350685Courtesy of GENERAL MOTORS CORP.
  7. Install the assist step support brackets and bolts (2) to the underbody.

    Tighten:  Tighten the assist step support bracket and bolts (2) to the underbody to 25 N.m (18 lb ft).

  8. Install the bolt from the inside of the pinchweld flange.
  9. Install the assist step support brace bolt (1) to the pinchweld flange.

    Tighten:  Tighten the assist step support brace bolt (1) to the pinchweld flange to 10 N.m (89 lb in).

    10. Fig 6: View Of Assist Step Plate Nuts
    GM350679Courtesy of GENERAL MOTORS CORP.
  10. Install the nuts that attach the assist step plate to the support bracket.

    Tighten:  Tighten the nuts that attach the assist step plate to the support bracket to 10 N.m (89 lb in).

    11. Fig 7: View Of Assist Step & Retainer
    GM350668Courtesy of GENERAL MOTORS CORP.
  11. When installing the assist step, check the height and the alignment to rocker panel, cladding and to the body.
  12. Install the rear section of the assist step extension.

    Align the rear edge of assist step extension with the rear edge of the retainer and pushing downward until fully seated.

    13. Fig 8: Identifying Rear Assist Step Extension Screws
    GM350672Courtesy of GENERAL MOTORS CORP.
  13. Install the screws to the rear outer edge of the assist step extension. If the vehicle is equipped with running boards, the cladding will be shorter on the left side only.

    Tighten:  Tighten the screws to the rear outer edge of the assist step extension to 2 N.m (18 lb in).

    14. Fig 9: Locating Assist Step Retaining Screws In Right Rear Inner & Outer Wheel Well
    GM394786Courtesy of GENERAL MOTORS CORP.
  14. Install the screws to the right rear inner and outer wheel well. Open the sliding door to expose the inner screw.

    Tighten:  Tighten the screws to the right rear inner and outer wheel well to 2 N.m (18 lb in).

    15. Fig 10: View Of Assist Step & Retainer
    GM350668Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Use the following steps when installing the assist step extensions to the retainer:
    • Check to ensure that the front assist step extension fits over the center of the rear extension.
    • Check for a suitable fit to the step well and the door opening.
    • Check the height and the alignment to the rocker panel and to the door opening.
    • Check the alignment to the cladding and to the body.
    • Check the alignment gaps between the wheel well molding and body.
    • Check the lower edge of the assist step extensions to ensure an even gap along the lower edge of the body.
  15. Install the assist step extensions to the retainer.
  16. Install the nut to the front lower corner of the assist step extension.

    Tighten:  Tighten the nut to the front lower corner of the assist step extension to 10 N.m (89 lb in).

  17. Lower the vehicle to a suitable height.
  18. Install the screws to the front assist step extension. Open the door to expose the inner screw.

    Tighten:  Tighten the front assist step extension screws to 2 N.m (18 lb in).

    19. Fig 11: Locating Assist Step Extension Screws
    GM350657Courtesy of GENERAL MOTORS CORP.
  19. Install the push clips to the front edge of the assist step extension.
    20. Fig 12: View Of Assist Step Extension Push Clips
    GM350737Courtesy of GENERAL MOTORS CORP.
  20. Install the screws to the front edge of the assist step extension.

    Tighten:  Tighten the screws to the front edge of the assist step extension to 7 N.m (62 lb in).

    21. Fig 13: Expanded View Of Assist Step Pad Nuts
    GM350651Courtesy of GENERAL MOTORS CORP.
  21. Install the assist step pad.
  22. Align the assist step pad to the assist step plate and press downward firmly until fully seated. The nuts are to be hand torqued.
  23. Install the assist step pad nuts.

    Tighten:  Tighten the assist step pad nuts to 2 N.m (18 lb in).

  24. Lower the vehicle.
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