Power Seat Motor

This procedure covers the removal and replacement of a power seat motor on a 2023 Chevrolet Bolt EUV electric vehicle.

Warnings

Tools required

Parts

• Power seat motor assembly × 1 — Use OEM specification - specify seat position and motor type (vertical, horizontal, recline, or lumbar)

Preparation

1. Ensure the vehicle is powered off and has been off for at least 5 minutes
2. Move the seat to the full forward or full rearward position to provide maximum access to the seat base and motor assemblies
3. Open the hood and locate the 12V battery in the engine compartment
4. Disconnect the negative terminal of the 12V battery and wait 2 minutes for system capacitors to discharge
5. Tilt the seat back if possible to provide better access to underside components
6. Gather all tools and the replacement motor before beginning disassembly

Procedure

1. 1

   Remove seat trim covers
   Using trim panel removal tools, carefully pry off the plastic trim covers on both sides of the seat base. These covers conceal the seat mounting bolts and motor access points. Start at the rear edge and work forward to release the retaining clips without breaking them. Set covers aside in a clean area.
2. 2

   Disconnect seat wiring harness
   Locate the main seat wiring harness connector under the seat. Press the release tab and pull the connector straight apart. If equipped with multiple connectors for heated seats or additional features, disconnect all connectors and note their positions for reassembly. Ensure connectors are moved away from the work area.
3. 3

   Identify the faulty motor
   Power seat assemblies typically contain multiple motors: horizontal track motor, vertical lift motors (front and rear), recline motor, and possibly lumbar motors. Visually inspect the motors to identify which one needs replacement. The horizontal motor is typically mounted to the seat track rail, vertical motors are on lift mechanisms, and the recline motor is near the seat back pivot.
4. 4

   Remove motor mounting bolts
   Using the appropriate socket, remove the bolts securing the motor to its bracket or mechanism. Most power seat motors are secured with 2-4 bolts. Support the motor with one hand while removing the final bolt to prevent it from falling. Note the orientation and position of any alignment marks or tabs on the motor housing.
   ⚠Do not allow the motor to hang by its wiring or linkage cables, as this can damage internal components.
   Torque spec

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

   Disconnect motor electrical connector
   Locate the electrical connector on the motor itself. This is separate from the main seat harness and directly connects to the motor. Press the locking tab and pull the connector straight off the motor terminals. Inspect the connector pins for corrosion or damage.
6. 6

   Disconnect motor drive cable or gear linkage
   Most power seat motors connect to the seat mechanism via a flexible drive cable or direct gear engagement. For cable-driven motors, release the cable end from the motor drive shaft by rotating the collar or pressing the release clip. For direct-drive motors, note the gear mesh position before separating. Remove the old motor from the seat assembly.
7. 7

   Prepare new motor for installation
   Unpack the new motor and verify it matches the removed unit in terms of connector type, mounting pattern, and drive mechanism. If the motor has an adjustable output shaft position, set it to match the removed motor to prevent binding. Inspect all mounting surfaces for debris or damage.
8. 8

   Install new motor
   Position the new motor in the mounting location, ensuring proper alignment of mounting holes and drive mechanism. Connect the drive cable or engage the gear linkage first, then align the motor to the mounting bracket. Start all mounting bolts by hand before tightening to ensure proper alignment.
   Torque spec

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

   Connect motor electrical connector
   Push the electrical connector firmly onto the motor terminals until it clicks into place. Verify the locking tab is fully engaged. Gently tug on the connector to confirm it is secure.
10. 10

    Reconnect seat wiring harness
    Reconnect all seat wiring harness connectors under the seat in their original positions. Ensure all locking tabs click into place. Route wiring away from moving parts and pinch points.
11. 11

    Reconnect 12V battery
    Return to the engine compartment and reconnect the negative terminal of the 12V battery. Tighten the terminal bolt to specification. Ensure the terminal connection is clean and secure.
    ⚠Do not overtighten the battery terminal bolt as specified in the torque specification to prevent terminal damage.
    Torque spec

    Battery Terminal Bolts6 Nm (4 lb-ft)
12. 12

    Reinstall seat trim covers
    Align the trim covers with their mounting positions on the seat base. Press firmly on all clip locations until each clip fully engages with an audible snap. Verify all edges are flush and properly seated.

Reassembly

1. Ensure all wiring harness connectors are fully seated and locked
2. Verify all trim panels are properly clipped in place with no gaps
3. Confirm the seat moves freely through its full range of motion without binding or unusual noises

Verification

• Power on the vehicle and test all seat movement functions: forward/back, up/down (if equipped), recline, and lumbar (if equipped)
• Verify the replaced motor operates smoothly without hesitation, grinding, or abnormal noise
• Test the seat through its complete range of motion in all directions to ensure proper operation
• Confirm no warning lights appear on the instrument cluster related to seat systems
• Verify all other seat functions (heating, memory, etc.) continue to operate normally if equipped

Related trouble codes on this vehicle

Codes that commonly send this job to the bay — tap one for symptoms, causes, and diagnostic steps.

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