GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 288580  Size: SH
  1. Position the antenna mast (2).
  2. • If the antenna mast is completely down, perform the following steps:
        1. With the ignition key in ACCY position, ask a helper to turn the radio to the ON position.
        2. When the mast tip (1) extends approximately 25.4 mm (1 in), remove the power by pulling the fuse.
    • If the antenna mast is above the fender, remove power by pulling the fuse.
  3. Remove the insulator stop (5), using a 14 mm deep well 12 point socket.
  4. Use a wrench or a suitable tool on the flat portions of the mast tip in order to remove the mast tip (1).
  5. • Grip the rod assembly (2) with pliers which are padded with cloth or rubber. This will prevent the rod assembly from turning.
    • Do not bend the rod (2).
  6. Slide over the rod assembly using long nose pliers or your fingers.
  7. Remove the inner tube assembly (3).
  8. Remove the outer tube assembly (4).

Installation Procedure


    Object Number: 288581  Size: SH
  1. Lubricate the contractor (5) with supplied lubricant before you assembly a new mast.
  2. Slide the assembly tool (4) over the contractor (5) in order to compress the fingers. The assembly tool is included in the replacement parts package.

  3. Object Number: 288580  Size: SH
  4. Slide the mast assembly over the rod assembly (2) and into the stationary tube (9) past the contractor fingers.
  5. Remove the assembly tool.
  6. Install the bottom mast into the stationary tube (9).
  7. The threaded top of the rod assembly (2) must be above the top of the inner rod assembly (3).

  8. Install the insulator stop (5).
  9. Install the mast tip (1).
  10. Return the fuse.