Diagnostic Aids

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

If the vehicle has not been reconfigured correctly or configured at all the system may not enter and cycle through each of the power states correctly.
In the event the OnStar® system loses, or is temporarily removed from battery power, the sleep cycle will not begin until the vehicle passes into an open outside area where a GPS signal can be acquired, providing a reference for time.

Fig 1: OnStar® Battery Consumption Test (Steps 1-5)

Courtesy of GENERAL MOTORS CORP.

Fig 2: OnStar® Battery Consumption Test (Steps 6-10)

Courtesy of GENERAL MOTORS CORP.