Noise Diagnosis - Rear of Vehicle (Rear Quarter Panel Styrofoam Itch)

Noise Diagnosis - Rear of Vehicle (Rear Quarter Panel Styrofoam Itch)





Symptom

High pitched itch coming from the rear (right, left or both) of the vehicle over moderate to rough roads. Sounds similar to sheet metal joint creaks.

Possible Cause

The stryofoam inserts located behind the quarter trim panel are contacting and rubbing against the quarter inner sheet metal surfaces.

Diagnosis

Look for witness marks on the styrofoam insert of the quarter panel inner sheet metal surface.

Corrective Action

Apply 3 pieces of 30 x 80 mm GM 6068M closed cell foam (P/N 22638774) or similar isolation material at specified location. Wrap foam around edges approximately 1/4 inch.