GM Service Manual Online
For 1990-2009 cars only

Rear Spoiler Replacement Without RPOB4U Special Edition

Removal Procedure


    Object Number: 318873  Size: SH
  1. Open the rear compartment.
  2. Remove the nuts from the studs on the rear end spoiler.
  3. Remove the rear end spoiler from the rear compartment lid.

Installation Procedure


    Object Number: 318873  Size: SH
  1. Install the rear end spoiler to the rear compartment lid.
  2. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Install the nuts to the studs on the rear compartment lid spoiler.
  4. Tighten
    Tighten the rear compartment lid spoiler nuts to 6 N·m (53 lb in).

  5. Close the rear compartment.

Rear Spoiler Replacement With RPO B4U Special Edition

Tools Required

J 25070 Heat Gun

Removal Procedure


    Object Number: 630914  Size: SH
  1. Open the rear compartment.
  2. Remove the 2 inner plugs from the compartment lid.

  3. Object Number: 630915  Size: SH
  4. Remove the nuts (mastic washers) from the studs on the rear end spoiler and discard.

  5. Object Number: 602278  Size: SH
  6. Heat the rear end spoiler mounting positions, using a heat gun J 25070 152 mm (6 in) from the surface.
  7. Apply the heat using a circular motion for about 30 seconds.

  8. Remove the rear end spoiler from the rear compartment lid using a small plastic flat-bladed tool.
  9. Remove all adhesive from the body panel using 3M™ scotch brite molding adhesive remover disk 3M™ P/N 07501 or equivalent.
  10. Clean the body panel using Varnish Makers and Painters (VMP) naphtha.

Installation Procedure


    Object Number: 630915  Size: SH
  1. Using a small paint brush apply zinc-chromate primer to the spoiler stud inner and outer holes.
  2. Clean the compartment lid attachment surface using with isopropyl alcohol and allow to flash off for 30 seconds.
  3. Important: Do not touch the adhesive backing.

  4. Remove the backing tape from the underside of the spoiler.
  5. Install the rear end spoiler to the rear compartment lid, pressing into place until the adhesive is fully seated.
  6. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  7. Install the new nuts (mastic washers) to the studs on the rear compartment lid spoiler.
  8. Tighten
    Tighten the rear compartment lid spoiler nuts to 6 N·m (53 lb in).


    Object Number: 630914  Size: SH
  9. Install the 2 inner compartment lid plugs to the compartment lid.
  10. Close the rear compartment.