Itch or Creak from Rear of Vehicle-Coupe
Symptom
Itch or slight creaking sound from the rear lift window striker.
Possible Cause
The rear lift window striker is moving on it's mounting surface.
Diagnosis
Road test on a ramp or road that twists the body and listen for the creak.
Corrective Action
- Remove the striker from the rear lift window panel. Refer to Rear Compartment Lift Window Latch Striker Replacement in Body Rear End.
- Add a 15 mm (0.6 in) diameter hook and loop patch between the striker and the lift window panel.
- Install the striker. Refer to Rear Compartment Lift Window Latch Striker Replacement in Body Rear End.
Rattle from Lock Pillar
Symptom
Rattle by the shoulder belt guide on the lock pillar.
Possible Cause
Hook and loop insulators on the belt guide cover are missing allowing the cover to contact the lock pillar trim.
Diagnosis
Visually check the underside of the guide cover for the loop insulators.
Corrective Action
Install two 12 mm (½ in) loop tape insulators on the underside of the guide cover.
Rattle from the Front of the Convertible Top Stowage Lid
Symptom
Stowage lid latch rattles on rough roads.
Possible Cause
Not enough pressure being applied to the stowage lid latch by the overslam bumpers.
Diagnosis
Road test on a rough surface.
Corrective Action
- Adjust the stowage lid overslam bumpers to properly position the vertical height of the stowage lid front edge.
- lower the latch to increase the pressure on the overslam bumpers as necessary.
Noise from Convertible Top Stowage Lid on Bumps
Symptom
Noise from the folding top stowage lid when driving over bumps.
Possible Cause
A stick/slip condition exists where the rubber stop bumpers contact the lid.
Diagnosis
Clean the stowage lid where the rubber stops contact the lid with a general purpose cleaner.
Corrective Action
Install a piece of 3M® Scotch Squeak Reduction Tape P/N 06356, or equivalent, where the bumpers contact the lid.
Slap from Parking Brake Cable
Symptom
Slap or rattle from the rear of the vehicle on bumps.
Possible Cause
The parking brake cable(s) is/are hitting the rear compartment floor, or the frame rail, outboard of the retaining clamp.
Diagnosis
Road test and listen for the slapping sound and/or raise the vehicle and tap on the cables.
Corrective Action
Install foam tape to the floor or the frame rail at the point of cable contact.
Slap or knock From a Rear Wheel
Symptom
A Slap or knock from a rear wheel once per wheel revolution during a turn or when the wheel is in a jounce/rebound condition.
Possible Cause
The brake cable making contact with the wheel weight once per wheel revolution or when the wheel is in a jounce/rebound condition.
Diagnosis
Road test. Then check wheel balance weights and parking brake cable for any evidence of contact.
Corrective Action
Adjust length of cable to shorten it slightly by pulling it through the clip on the body.
Squeak or Itch from Rear Corner of Body
Symptom
Squeak or itch from the rear of the vehicle.
Possible Cause
The rear body panel bond, in the area of the rear lift window panel tension bumper, rubs the underside of the rear compartment opening surround panel.
Diagnosis
Open the rear lift window panel and apply pressure to the side of the surround and listen for a chirp sound.
Corrective Action
Add epoxy adhesive GM P/N 12377980, or equivalent, in the area of the hatch surround below the tension bumper to securely bond the underside of the rear corner of the surround to the rear body panel.
Squeak or Itch from Rear Corner of Fascia
Symptom
Squeak or itch from the rear of the vehicle.
Possible Cause
The rear fascia and/or the rear corner of the quarter panel rubs on the rear body panel.
Diagnosis
Open the rear lift window panel and apply pressure to the fascia and the rear corner of the quarter panel and listen for an itching sound.
Corrective Action
Install a very thin sheet of anti squeak material between the fascia and the rear body panel and under the rear corner of the quarter panel. Can use a wide piece of flocking or felt.
- Remove the outer taillamp for access.
- Open the lid and remove the three exposed quarter panel screws.
- Remove the center and two outer fascia screws.
- Install the anti squeak material ensuring the material passes completely under the fascia.
- Trim off any excess anti squeak material.
- Reinstall the taillamp, the quarter panel screws and the fascia screws. Refer to Fastener Tightening Specifications in Body Rear End.
Tapping from Behind Drivers Seat
Symptom
Tapping noise behind the drivers seat.
Possible Cause
The fuel door manual release tab contacts the rear compartment acoustic panel.
Diagnosis
Visually inspect and manually move the tab checking contact.
Corrective Action
Add hook and loop tape or flocked tape to the bottom of the acoustic panel in the area of contact.
Stowage Roof Retainer Itching
Symptom
An itching or squeaking noise heard on rough road surfaces when the roof lift off panel is stowed away.
Possible Cause
The two pieces of plastic that make up the barrel for the pin, need lubrication at the hooks opposite the attaching screws.
Diagnosis
Road test the vehicle with the removable top stowed in the rear compartment. Listen for an itching or squeaking noise from the retaining hooks.
Corrective Action
Lubricate the contact points at the hooks.
