Drive Belt Chirping Diagnosis

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.

Step	Action	Yes	No
DEFINITION: The following items are indications of chirping: A high pitched noise that is heard once per revolution of the drive belt or a pulley. It usually occurs on cold damp mornings. Verify the condition by spraying water on the belt. The noise should stop momentarily.
1	Check for misalignment of the pulleys. Are any of the pulleys misaligned?	Go to Step 2	Go to Step 3
2	Replace any misaligned pulleys. Is the chirp still present?	Go to Step 3	System OK
3	Check for bent or cracked brackets. Are there any bent or cracked brackets?	Go to Step 4	Go to Step 5
4	Replace any bent or cracked brackets. Is the chirp still present?	Go to Step 5	System OK
5	Check for any loose or missing fasteners. Are there any loose or missing fasteners?	Go to Step 6	Go to Step 7
6	Tighten any loose fasteners. Replace any missing fasteners. Refer to Fastener Tightening Specifications . Is the chirp still present?	Go to Step 7	System OK
7	Check for a bent pulley flange. Is there a bent pulley flange?	Go to Step 8	Go to Step 9
8	Replace the pulley. Is the chirp still present?	Go to Step 9	System OK
9	Check for severe pilling, exceeding 1/3 of the belt groove depth. Is there severe pilling?	Go to Step 10	-
10	Replace the drive belt. Refer to Drive Belt Replacement . Is the repair complete?	-	System OK