2004 Chevrolet Optra Base, AutomaticFACTORY OEM SERVICE PROCEDURE

Grid Line Repair

    CAUTION: Refer to Battery Disconnect Caution in Cautions and Notices.
  1. Disconnect the negative battery cable.
  2. Disconnect the rear window defogger electrical connector.
  3. Inspect the rear window defogger grid lines.
  4. Mark the grid line break on the outside of the glass with a wax pencil or a crayon.
    5. Fig 1: Cleaning Grid Lines
    GM1308961Courtesy of GENERAL MOTORS CORP.
  5. Buff the grid lines that are to be repaired with steel wool. Wipe the lines clean using a cloth dampened with alcohol. Buff and clean about 6 mm (0.25 in) beyond each side of the break in the grid line.
    6. Fig 2: View Of Repair Decal
    GM1256767Courtesy of GENERAL MOTORS CORP.
  6. Attach a grid line repair decal or 2 strips of tape above and below the repair areas.
    • A repair decal or tape must be used in order to control the width of the repair areas.
    • If a decal is used, the die-cut metered slot must be the same width as the grid line.
  7. Apply the grid repair material to the repair area using a small wooden stick or a spatula. The grid repair material should be at room temperature.
  8. Carefully remove the decal or the tape.
    9. NOTE: The grid line repair material must be cured with heat. To avoid heat damage to the interior trim, protect the trim near the repair area where heat is to be applied.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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