Heated Seat Module

This procedure covers the removal and replacement of the heated seat module on the 2023 Chevrolet Bolt EUV, including proper disconnection of electrical connectors and torque specifications.

Warnings

Tools required

Parts

• Heated seat module × 1 — Use OEM specification
• Seat trim panel clips (if damaged) × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and engage parking brake
2. Turn off all electrical accessories and ensure ignition is off
3. Open hood and disconnect the 12V battery negative terminal
4. Wait minimum 2 minutes for capacitors to discharge
5. Move front seat fully forward to access rear mounting bolts, then fully rearward to access front mounting bolts

Procedure

1. 1

   Remove seat trim covers
   Locate the plastic trim covers on the sides of the seat base. Using trim panel removal tools, carefully pry the side trim panels away from the seat frame. Work slowly to avoid breaking the retaining clips. Set trim panels aside in a safe location.
2. 2

   Disconnect seat electrical connectors
   Locate all electrical connectors under the seat including the heated seat module connector, seat position sensor, and occupancy sensor. Press the locking tabs and disconnect each connector. Note the connector positions and routing for reinstallation.
3. 3

   Remove seat mounting bolts
   Using a Torx T30 driver, remove the four seat mounting bolts (two front, two rear). Support the seat while removing the final bolts. Carefully lift the seat assembly out of the vehicle with assistance if needed, as seats can be heavy.
   Torque spec

   Module Mounting Bolts8 Nm (6 lb-ft)
4. 4

   Remove seat cushion cover
   With the seat removed from the vehicle, turn it upside down on a clean work surface. Locate the hog rings or plastic clips securing the seat cushion cover to the seat frame. Using hog ring pliers or trim tools, release the fasteners around the perimeter of the cushion. Carefully pull the cushion cover back to expose the heated seat module.
5. 5

   Disconnect heated seat element connectors
   Locate the heated seat element connectors attached to the heating pad within the cushion. These will be connected to the heated seat module. Press the connector locking tabs and disconnect both heating element connectors. Note their orientation.
6. 6

   Remove heated seat module mounting hardware
   The heated seat module is typically secured to the seat frame with bolts or screws. Using a 10mm socket or appropriate Torx driver, remove the module mounting bolts. Keep track of any brackets or spacers that may be present.
   Torque spec

   Module Mounting Bolts8 Nm (6 lb-ft)
7. 7

   Remove heated seat module
   Carefully remove the heated seat module from the seat frame. Inspect the mounting location for any damage or corrosion. Check the condition of the heating element connectors and wiring harness for signs of wear or damage.
8. 8

   Install new heated seat module
   Position the new heated seat module in the mounting location on the seat frame. Align the mounting holes and ensure the module sits flush against the mounting surface. Install the module mounting bolts hand-tight initially, then torque to specification.
   Torque spec

   Module Mounting Bolts8 Nm (6 lb-ft)
9. 9

   Reconnect heated seat element connectors
   Connect the heated seat element connectors to the new module, ensuring they are fully seated and the locking tabs engage. Verify the connectors are secure by gently tugging on them. Route wiring to avoid pinch points.
10. 10

    Reinstall seat cushion cover
    Pull the seat cushion cover back over the seat frame and heating elements. Ensure the heating pad is properly positioned and not wrinkled. Reinstall all hog rings or clips around the perimeter to secure the cushion cover to the seat frame.
11. 11

    Reinstall seat assembly
    With assistance if needed, position the seat assembly back into the vehicle over the mounting points. Align all four mounting bolt holes. Install the seat mounting bolts and torque to specification in a cross pattern.
    Torque spec

    Module Mounting Bolts8 Nm (6 lb-ft)
12. 12

    Reconnect seat electrical connectors
    Reconnect all electrical connectors under the seat in their original positions. Ensure each connector locks into place with an audible click. Verify proper routing of wiring harnesses to prevent pinching.
13. 13

    Reinstall trim panels and reconnect battery
    Reinstall the seat side trim panels by aligning the retaining clips and pressing firmly until they snap into place. Reconnect the 12V battery negative terminal and torque to specification.
    Torque spec

    Battery Terminal Bolts6 Nm (4 lb-ft)

Reassembly

1. Ensure all electrical connectors are fully seated and locked before operating the vehicle
2. Verify seat is securely mounted by attempting to rock it back and forth
3. Check that seat cushion cover is properly secured with no loose areas

Verification

• Turn ignition to ON position and verify no warning lights related to seat systems appear on instrument cluster
• Test heated seat function on all temperature settings to confirm proper operation
• Move seat through full range of adjustment to ensure no interference with wiring or module
• Verify seat occupancy sensor is functioning if equipped (seatbelt warning should activate when seat is occupied)
• Check for any unusual odors during first use of heated seat function

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