GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 Corvette 🢒 Body Repair 🢒 Frame and Underbody 🢒 Rear Crossmember Bolt Replacement

Removal Procedure

    Object Number: 800588 Size: SH
  1. Use hand tools to remove the nut from the forward bolt that you are replacing.
  2. Remove the rear compartment floor carpet. Refer to Rear Compartment Floor Panel Carpet Replacement.

    3. Object Number: 175263 Size: SH
  3. Locate the scribed marks labeled XMBR BOLT in the floor which identifies the area directly over the front bolt to be replaced. The scribed marks are located approximately 230 mm (9 in) inward from the rear compartment side panel and 255 mm (10 in) rearward of the intermediate panel.

    4. Object Number: 173945 Size: SH

    Note: Fuel system components lie under the cargo compartment floor. When drilling the access hole restrict the drilling depth to 6 mm (3/16 in).

  4. Drill an access hole with a 50-mm (2-in) hole saw directly over the bolt.

    5. Object Number: 812631 Size: SH
  5. Use snap ring pliers to remove the spring clip.
  6. Remove the bolt.

Installation Procedure

    Object Number: 812631 Size: SH

    Note: Verify that you have selected a bolt of the proper length.

  1. Install the crossmember bolt.
  2. Use snap ring pliers to install the spring clip.

    3. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 800588 Size: SH
  3. Install a new nut to the crossmember bolt and tighten the nut with hand tools.

    4. Tighten
    Tighten the nut to 110 N·m (81 lb in).


    Object Number: 812632 Size: SH
  4. Cut a suitable piece of galvanized steel or fiber reinforced plastic sized to cover the hole in the floor with at least a 25-mm (1-in) overlap on all sides.

    5. Note: Fuel system components lie under the cargo compartment floor. Do not use rivets or screws to attach the cover over the hole.

  5. Lightly scuff sand the bonding surfaces of both the panel and the cover.
  6. Wipe each bonding surface with alcohol.
  7. Apply a 3-6 mm (1/8 -1/4 in) bead of adhesive around the perimeter of the cover.

    8. Object Number: 193330 Size: SH
  8. Install the cover over the hole in the floor. Apply pressure to the cover to squeeze out the adhesive and form a consistent leak-proof seal.

    9. Note: A leak proof seal is essential so that exhaust and fuel fumes cannot enter the vehicle.

  9. Smooth out the adhesive around the cover. Verify that no skips or gaps occur.
  10. Allow the bonding adhesive to cure.

    11. Object Number: 193336 Size: SH
  11. Install the rear compartment carpet. Refer to Rear Compartment Floor Panel Carpet Replacement.