GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2003 🢒 Seville 🢒 Body and Accessories 🢒 Seats 🢒 Driver or Passenger Seat Back Cushion Heater Replacement

Seat Heat Element Installation Procedure

    Object Number: 1322922 Size: SH

    Important: Do NOT attempt to remove the factory heat elements from the seat trim cover. Install the service heat element between the existing factory heat element and the seat trim cover.

  1. Remove the trim cover with the nonfunctional heat element. Refer to Front Seat Back Cushion Cover and Cushion Pad Replacement .
  2. Place the seat trim cover on a clean flat surface with the inside facing out.

    3. Object Number: 1338072 Size: SH

    Important: Do NOT begin the cut with a jab or a poke.

  3. Remove the wiring harness from ONLY the non-functioning factory heat element. Use a pair of diagonal side cutters to cut the wiring as close to the trim cover as possible.

    4. Object Number: 1322986 Size: SH
  4. If you are installing a center heat element, create an opening between the nonfunctional factory heat element (1) and the seat trim cover as close to the seam (2) as possible. Use a razor blade or equivalent and carefully slice through the factory heat element until you create a hole.
    5. • Insert your fingers through the hole and lift the center heat element material (1) away from the trim cover material.
    • Use scissors or a razor blade to cut the center heat element material along the entire length of the seam (2) from corner to corner.

    Object Number: 1338071 Size: SH
  5. If you are installing an inner or an outer heat element, create an opening (4) in the middle of the factory heat element (3). Use a razor blade or equivalent and carefully slice through the factory heat element until you create a hole.
    6. • Insert your fingers through the hole and lift the center heat element material (1) away from the trim cover material.
    • Use scissors or a razor blade to create an opening (4) of length 20-25 cm (8-10 in) in the middle of the factory heat element.
  6. Insert the service heat element (5), with the backing paper side up, between the trim cover material and the factory heat element material (6).
  7. Ensure that the service heat element is lying flat, tucked into each corner and extends to each side.

    8. Object Number: 1326567 Size: SH
  8. Carefully remove the backing paper from the service heat element.
  9. Insert the inner or the outer heat element (8) with the backing paper side up, between the trim cover material and the factory heat element material (7).
  10. Ensure that the service heat element is lying flat, tucked into each corner and extends to each side.
  11. Carefully remove the backing paper from the service heat element.
  12. Use 3M® Highland Cloth Duct Tape, P/N 06969 or equivalent to cover the opening.
  13. On trim covers with three heat elements, connect the inner and the outer heat element 2-way white connectors to the center heat element harness.
  14. Install the seat trim cover. Refer to Front Seat Back Cushion Cover and Cushion Pad Replacement .
  15. Assemble the seat assembly.
  16. Place the seat assembly inside the vehicle. Do NOT install the seat at this time.
  17. Verify that the seat heat function is operational.
  18. Complete the seat assembly installation. Refer to Front Seat Replacement - Bucket .