GM Service Manual Online
For 1990-2009 cars only

Noise Diagnosis - Seat Head Restraint Rattle

Head Restraint Rattle


Object Number: 397223  Size: MH

Symptom:

Rattle coming from the head restraint area.

Possible Cause:

Head restraint posts rattling in the receiver holes.

Diagnosis:

Test drive the vehicle, and apply pressure to the head restraint.

Corrective Action:

    • Remove the head restraint.
    • Bend the posts approximately 25.4 mm (1.0 in) outward. This pre-loads the posts in the receiver holes.

Noise Diagnosis - Seat Rear Seatback Cushion Rattle

Rear Seatback Cushion Rattle


Object Number: 397226  Size: SH

Symptom

Rattle from the rear seatback rest area.

Possible Cause

    • Check for the seat belt buckle hitting the seat trim.
    • Rear seatback is not in tension against to the striker bolt. This allows the latch to rattle on the striker bolt.

Diagnosis

Test drive the vehicle, apply pressure to the rear seatback, listen for the rattle.

Corrective Action

    • Insure that the rear seat is in the proper location (rearward as far as possible).
    • Loosen the lower hinge bolt.
    • Push the bottom of the seat rearward and apply pressure rearward.
    • Retighten the nuts.

Tighten
Tighten the pivot support nut to 24 N·m (18 lb ft).

    • Reevaluate. If condition persists, loosen striker and reposition rearward as far as possible. Bend striker with mallet to create and interference fit.

Noise Diagnosis - Seat Front Seat Creak

Front Seat Creak


Object Number: 397227  Size: MH

Symptom

Creak heard in seat back when occupants weight shifts.

Possible Cause

Seatback hinge recliner bolts not tightened to specifications.

Diagnosis

Check bolt torque.

Corrective Action

Tighten bolt to specifications.

Tighten
Tighten the seatback hinge recliner bolts to 24 N·m (18 lb ft).

Noise Diagnosis - Seat Front Seat Belt Rattle

Front Seat Belt Rattle


Object Number: 397228  Size: MH

Symptom

Rattle from the side of the front seat.

Possible Cause

The seat belt latch rattles against the plastic trim of the seat.

Diagnosis

Visually inspect the seat belt latch and seat for contact.

Corrective Action

Add felt tape to the plastic part of the seat belt latch.