| Subject: | Information on Obtaining Upgraded/Updated Navigation Disc | 
| Models: | 2005 Buick Rainier, Rendezvous | 
| 2005 Cadillac Escalade, Escalade ESV, Escalade EXT | 
| 2005 Chevrolet Avalanche, Suburban, Tahoe, TrailBlazer, TrailBlazer EXT | 
| 2005 GMC Denali, Envoy, Envoy XL, Envoy XUV, Yukon | 
| 2005 HUMMER H2 | 
| with Navigation System (RPO UM8) | 
This bulletin is being issued to cancel Corporate Bulletin Number 04-08-126-001. Please discard all copies of Corporate Bulletin Number 04-08-126-001 (Section 08 - Body and Accessories).
Built Prior to the Following VIN Breakpoints:
Vehicle  | VIN Breakpoint  | 
|---|---|
Rendezvous  | 5S500141  | 
Escalade, Escalade ESV, Escalade EXT, Avalanche, Suburban, Tahoe, Denali, Yukon  | Silao: 5G100034 Arlington: 5R100030 Janesville: 5J100030  | 
TrailBlazer, Envoy, Rainier  | 52100054  | 
TrailBlazer EXT, Envoy XL, Envoy XUV  | 56100050  | 
HUMMER H2  | 5H101767  | 
This bulletin is being issued to inform technicians that these discs are no longer available. At this time, all effected vehicles should have already received the upgrade/update.