TSB : OnStar(R) - Revised VIU And VCU Replacement Procedure

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File In Section: 08 - Body and Accessories Bulletin No.: 02-08-46-011 Date: September, 2002 SERVICE MANUAL UPDATE Subject: Revised OnStar(R) Vehicle Interface Unit (VIU) Replacement and OnStar(R) Vehicle Communication Unit (VCU) Replacement Reconfiguration Procedure Models: 2001-2002 Buick LeSabre, Park Avenue 2002 Buick Rendezvous 2001 Cadillac Catera, DeVille, Seville 2001-2002 Cadillac Eldorado 2001 Chevrolet Blazer, Impala, Monte Carlo 2001-2002 Chevrolet Silverado, Suburban, Tahoe, Venture 2001 GMC Envoy, Jimmy 2001-2002 GMC Sierra, Yukon, Yukon XL 2001 Oldsmobile Bravada, Intrigue 2001-2002 Oldsmobile Aurora, Silhouette 2001-2002 Pontiac Aztek, Bonneville, Grand Prix, Montana with Generation 3 OnStar(R) (RPO UE1) This bulletin is being issued to revise the reconfiguration procedure found in the OnStar(R) Vehicle Interface Unit (VIU) Replacement and the OnStar(R) Vehicle Communication Unit (VCU) Replacement procedures in the Cellular Communication sub-section of the Service Manual. Please replace the current information in the Service Manual with the following information. The following information has been updated within SI. If you are using a paper version of this Service Manual, please make a reference to this bulletin on the affected page. Due to a new process for configuring replacement Generation 3 (formerly 2.6) OnStar(R) modules for the OnStar(R) Personal Calling feature, vehicles equipped with this version of the system will require a revised OnStar(R) Reconfiguration procedure in the event of module replacement. In addition, the Station Identification Number (STID) and Electronic Serial Number (ESN) numbers are currently accessible by means of the scan tool The procedures for both the Vehicle Interface Unit and Vehicle Communication Unit differ only in which number (STID or ESN) is recorded and transferred to the OnStar(R) Call Center. Important : After replacing the VIU or VCU, you must reconfigure the OnStar(R) system. Failure to reconfigure the system will result in an additional customer visit for repair. 1. Press and hold the white Dot button until the OnStar(R) status LED turns from green to red, and back again to green. 2. Install a scan tool. Use the ID information menu to access the new STID (VIU) or ESN (VCU) number. 3. Move the vehicle to an open area that is away from tall buildings and with a clear view of unobstructed sky. Allow the vehicle to run for 10 minutes. 4. Press the blue OnStar(R) button to connect to the OnStar(R) Call Center. Tell the advisor that this vehicle has received a new VIU or VCU and ask the advisor to perform the following procedure: 5. Add the new STID (VIU) or ESN (VCU) to update the customer's account. 6. Follow any additional instructions from the OnStar(R) advisor. 7. Ask the advisor to activate the OnStar(R) Personal Calling feature, if available. Disclaimer