Removal Procedure

The lumbar pump and control module are separate units that are attached to each other by a wire harness and a hose. They are supplied and replaced as an assembly. The lumbar pump is contained in a vinyl pouch under the seat and is tie strapped to the seat adjuster torque tube. The attached control module is contained in a vinyl pouch and is secured with J strips to the bottom of the seat support springs. The service part is supplied with connector fittings and the air hoses are labeled #3, #4, and #5 to aid in assembly.

Fig 1: Seat Cushion Cover

Courtesy of GENERAL MOTORS CORP.

1. Raise the seat to the full up position.
2. Remove the seat. Refer to SEAT REPLACEMENT (POWER)  or SEAT REPLACEMENT (MANUAL) .
3. Remove the seat cushion cover. Refer to SEAT CUSHION TRIM COVER AND PAD REPLACEMENT .
4. Remove the tie straps attaching the pump to the torque tube (4) under the seat.
5. Remove the control module by unhooking the J strips from the seat cushion support wires.
   Fig 2: Removing Tie Straps Attaching Pump To Torque Tube Under Seat

   Courtesy of GENERAL MOTORS CORP.
6. Disconnect the electrical connector.
7. Reposition the pump and the lumbar control module from under the seat support wires to on top of the seat support wires.
   Fig 3: Disconnecting Electrical Connector

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8. Cut the control module to bladder air hoses (1) 75 mm (3 in) from the control module (5).
9. Remove the pump (4) and the control module (5) as an assembly.
   Fig 4: Pump & Control Module Assembly

   Courtesy of GENERAL MOTORS CORP.