GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
GMC_Truck
🢒
2007
🢒
Sierra Classic - 4WD
🢒
Seats
🢒
Seat Hardware, Trim, and Upholstery
🢒 Front Seat Lumbar Support Replacement
Tools Required
J 34940
Rivet Gun
Removal Procedure
Remove the front seat from the vehicle. Refer to
Front Seat Replacement - Bucket
.
Remove the head restraint and guides. Refer to
Head Restraint Replacement
.
Remove the seat back cover and pad. Refer to
Front Seat Back Cushion Cover and Cushion Pad Replacement
.
Drill out the rivet holes on the bolster paddles (1).
Detach the lumbar clip from the top of the seat frame.
Remove the lumbar wire from the bottom of the seat frame.
Disconnect the electrical connectors to the motors.
Remove the power lumbar/bolster assembly from the seat.
Installation Procedure
Position the power lumbar/bolster assembly on the seat.
Connect the electrical connectors to the motors.
Fasten the lumbar wire at the bottom of the frame.
Attach the lumbar clip onto the top of the seat frame.
Install the rivets to secure the bolster paddles (1).
Install the seat back cover and pad. Refer to
Front Seat Back Cushion Cover and Cushion Pad Replacement
.
Install the head restraint and guides. Refer to
Head Restraint Replacement
.
Install the seat in the vehicle. Refer to
Front Seat Replacement - Bucket
.