Heated Seat Module

This procedure covers the removal and replacement of the heated seat module, typically located under the driver or passenger seat on 2014-2018 Chevrolet Silverado 1500 trucks equipped with heated seats.

Warnings

Tools required

Parts

• Heated seat control module × 1 — Use OEM specification
• Electrical connector lubricant × 1 — ACDelco dielectric grease

Preparation

1. Park vehicle on level surface and engage parking brake
2. Turn ignition to OFF position and remove key
3. Disconnect negative battery terminal and wait at least 2 minutes
4. Move the affected seat fully forward to access rear mounting bolts
5. If necessary, remove any floor mats or debris from under the seat area

Procedure

1. 1

   Disconnect battery
   Disconnect the negative battery terminal using a 10mm socket. Wait at least 2 minutes before proceeding to allow airbag system capacitors to discharge.
   Torque spec

   Battery Terminal Bolts6 Nm (4 lb-ft)
2. 2

   Access seat mounting bolts
   Move the seat fully forward on its track. Locate the two rear seat mounting bolts at the rear seat track mounting points. These are typically 13mm or 15mm bolts.
3. 3

   Remove rear seat mounting bolts
   Remove the two rear seat mounting bolts using the appropriate socket. Support the seat to prevent it from tipping backward. Move the seat fully rearward to access the front mounting bolts.
   Torque spec

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

   Remove front seat mounting bolts
   With the seat moved fully rearward, remove the two front seat mounting bolts. Keep all four bolts organized for reinstallation.
   Torque spec

   Module Mounting Bolts8 Nm (6 lb-ft)
5. 5

   Disconnect seat electrical connectors
   Carefully tilt the seat backward to access the underside. Locate all electrical connectors under the seat including power seat, heated seat, and airbag connectors if equipped. Press the release tabs and disconnect each connector. Note the position and routing of each connector for reinstallation.
6. 6

   Remove seat from vehicle
   With all electrical connectors disconnected, carefully lift the seat assembly out of the vehicle. Place it on a clean, protected work surface with the bottom facing up. This may require two people due to seat weight.
7. 7

   Locate heated seat module
   With the seat inverted, locate the heated seat control module. It is typically a small rectangular module mounted to a bracket on the seat frame, connected to the seat heater element wiring harness. Use a flashlight to clearly identify the module and its mounting location.
8. 8

   Disconnect module electrical connectors
   Identify the electrical connectors attached to the heated seat module. Typically there are 2-3 connectors: power input, seat heater pad connections, and control switch connection. Press the connector release tabs and carefully disconnect each connector from the module. Inspect connectors for corrosion or damage.
9. 9

   Remove module mounting hardware
   Remove the bolts or screws securing the heated seat module to its mounting bracket. These are typically 8mm bolts. Remove the module from the seat frame.
   Torque spec

   Module Mounting Bolts8 Nm (6 lb-ft)
10. 10

    Install new heated seat module
    Position the new heated seat module onto the mounting bracket in the same orientation as the original. Install the mounting bolts and torque to specification. Ensure the module is securely mounted and properly oriented.
    Torque spec

    Module Mounting Bolts8 Nm (6 lb-ft)
11. 11

    Reconnect module electrical connectors
    Apply a small amount of dielectric grease to the electrical connector terminals if desired. Reconnect all electrical connectors to the new module, ensuring each connector clicks securely into place. Verify proper connection by gently tugging on each connector.
12. 12

    Reinstall seat assembly
    Carefully lift the seat assembly and position it back into the vehicle over the seat track mounting points. Reconnect all electrical connectors under the seat including power seat, heated seat control switch, and any airbag connectors. Ensure connectors are fully seated and locked.
13. 13

    Install seat mounting bolts
    Install the front two seat mounting bolts finger-tight. Move the seat fully forward and install the rear two mounting bolts finger-tight. Torque all four mounting bolts to specification in a cross pattern.
    Torque spec

    Module Mounting Bolts8 Nm (6 lb-ft)
14. 14

    Reconnect battery and test
    Reconnect the negative battery terminal and torque to specification. Start the vehicle and turn on the heated seat function. Verify that the heated seat indicator light illuminates and the seat begins to warm within 2-3 minutes. Test all seat functions including power adjustments if equipped.
    Torque spec

    Battery Terminal Bolts6 Nm (4 lb-ft)

Reassembly

1. Ensure all electrical connectors are properly seated and locked before operating heated seat function
2. Verify seat is securely mounted with all four bolts torqued to specification before driving
3. Test seat movement on tracks to ensure no interference with wiring harnesses

Verification

• Turn ignition to ON position and activate heated seat function using seat control switch
• Verify heated seat indicator light illuminates on the switch
• Allow 2-3 minutes and verify seat cushion is warming evenly
• Test all heat level settings (low, medium, high) if equipped with multi-level heating
• Verify no warning lights are illuminated on instrument cluster
• Confirm all other seat functions operate normally including power adjustments and lumbar support if equipped

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