Power Steering High Pitched Whistle Noise Heard in Any Gear with Vehicle Warm (No Fix Available at This Time)
| Subject: | High Pitched Whistle Noise Heard in Any Gear With Vehicle Warm (No Fix Available at This Time) |
| Models: | 2007 Cadillac Escalade, Escalade ESV, Escalade EXT |
| 2007 Chevrolet Avalanche, Suburban, Silverado 1500, Tahoe |
| 2007 GMC Sierra 1500, Yukon, Yukon XL |
This bulletin is being revised because a new fix is being developed. Please discard Corporate Bulletin Number 06-02-32-010 (Section 02 -- Steering).
Condition
Some customers may comment on a high-pitched whistle noise. This noise occurs just off idle in any gear with the vehicle warm. It can best be heard when seated in the vehicle, with the windows up, and the radio and HVAC off. The noise will be a very low amplitude (low volume level) and very high frequency (similar to a dog whistle).
Cause
The source of the noise described above is internal to the steering gear. Engineering is currently investigating the cause of this noise and working to develop a correction.
Correction
No correction is available at this time. DO NOT replace the steering gear in an attempt to correct this correction. This bulletin will be revised when a fix becomes available.
