Cooling System - Chirp/Click From Engine Fan Area
TECHNICALBulletin No.: 09-06-02-002A
Date: March 29, 2010
Subject: Clicking/Chirping Noise Coming From Engine Cooling Fan Area (Remove Witness Marks on Shroud)
Models:
2008-2010 Buick Enclave
2009-2010 Chevrolet Traverse
2008-2010 GMC Acadia
2008-2009 Saturn OUTLOOK
Built Prior to September 01, 2009
Supercede:
This bulletin is being revised to add the 2010 model year and a build date breakpoint. Please discard Corporate Bulletin Number 09-06-02-002 (Section 06 - Engine/Propulsion System).
Condition
Some customers may comment on a clicking/chirping noise coming from the engine cooling fan area.
Cause
The engine cooling fan shroud around either of the electric fans may be out of round creating contact.
Correction
1. Inspect the vehicle for the above condition by commanding the cooling fans ON with a scan tool. Determine if one or both of the fans are creating any noise. If any chirping/clicking noise emanates from the cooling fan area, proceed with this bulletin.
2. Remove the cooling fan and shroud assembly. Refer to the Cooling Fan and Shroud Replacement procedure in SI.
3. Place the fan/shroud assembly on a workbench.
Note
The fan shroud will most likely be warped at the 12 o'clock position (1) as indicated in the above illustration.
4. Inspect the top of the shroud assembly for this condition. Then rotate the assembly so that the bottom is now positioned at the top and inspect it again.
Important
Because the fan can be assembled into the shroud in three different positions, before removing either of the electric fans, use a paint stick or similar marking device to note the orientation of each fan in order to reassemble each fan into the same exact position.
5. Remove one or both of the electric fans as needed, and inspect for witness marks (1) where the fan is hitting the shroud as indicated in the above illustration. Both the top and the bottom of the shroud have this area that may come in contact with the fan.
6. Using a suitable grinding tool, carefully remove the excess material until the area is smooth and all contact with the fan has been eliminated as indicated in the above illustration.
7. Install the cooling fan and shroud assembly. Refer to the Cooling Fan and Shroud Replacement procedure in SI.
Warranty Information
For vehicles repaired under warranty, use the table above.
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