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Ignition ON, press the OnStar® Call buttons one at the time. Verify that all of the OnStar® If some OnStar® buttons are inoperative but not all, replace the inside rearview mirror. If none of the OnStar® buttons operate, refer to circuit/system testing. Circuit/System Testing 1. Ignition OFF, disconnect the harness connector at the inside rearview mirror. 2. Ignition ON, test for 9.8-10.2 volts between the keypad supply voltage circuit terminal 12 and ground. If less than the specified range, test the supply voltage circuit for a short to ground or If greater than the specified range, test the supply voltage circuit for a short to voltage. 3. Test for 0 volt between the keypad signal circuit terminal 11 and ground. If greater than the specified range, test the keypad signal circuit for a short to voltage. 4. Test for 9.8-10.2 volts between the keypad supply voltage circuit terminal 12 and the keypad signal circuit terminal 11. If less than the specified range, test the keypad signal circuit for an open/high 5. Test for less than 5 ohms between the mirror ground circuit terminal 8 and ground. If greater than the specified range, test the ground circuit for an open/high resistance. 6. Ignition OFF, disconnect the CIM X1 connector. Test for infinite resistance between the keypad signal circuit terminal 11 and ground. If less than the specified range, test the keypad signal circuit for a short to ground. 7. If all circuits test normal, test or replace the button assembly. Component Testing 1. Ignition OFF, disconnect the harness connector at the inside rearview mirror. 2. Test for infinite resistance between the keypad supply voltage terminal 12 and the keypad signal terminal 11. IMPORTANT: Contact the OnStar® Call Center first before pressing the emergency button in order to notify them of the test.
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Cellular, Entertainment, and Navigation - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
If less than the specified range, replace the inside rearview mirror. 3. Test for 1.4k-1.6k ohms between the keypad supply voltage terminal 12 and the keypad signal terminal 11 while pressing the black phone button. If not within the specified range, replace the inside rearview mirror. 4. Test for 2.7k-3.3k ohms between the keypad supply voltage terminal 12 and the keypad signal terminal 11 while pressing the blue On-Star® button. If not within the specified range, replace the inside rearview mirror. 5. Test for 11.7k-14.3k ohms between the keypad supply voltage terminal 12 and the keypad signal terminal 11 while pressing the red emergency button. If not within the specified range, replace the inside rearview mirror. Repair Procedures Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Inside Rearview Mirror Replacement Control Module References for CIM replacement, setup, and programming ONSTAR RECONFIGURATION (WITH TIS 2 WEB GEN 4 AND LATER) IMPORTANT: The vehicle communication interface module (VCIM) has a
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Cellular, Entertainment, and Navigation - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
1. Connect the Tech 2 to the vehicle. 2. Connect the Techline Information System (TIS) terminal to the Tech 2. 3. Select the OnStar® Activation programming option using the service programming system (SPS). 4. Upon completion of the OnStar® Activation programming event, disconnect the TIS terminal from the Tech 2 and perform the VCIM/OnStar Set-up Procedure using the Tech 2. 5. The default language for the new VCIM is English. Changing the language capability to French or Spanish is supported by service programming system (SPS) and by Tech 2 special Inform the customer that it may take up to 24 hours for the OnStar® service to become fully ONSTAR STEERING WHEEL CONTROL FUNCTIONS INOPERATIVE Some vehicles equipped with the OnStar® system have the capability of accessing voice The steering wheel controls are a resistor network that consist of multiple momentary contact process which enables an automated activation by the It may take up to 24 hours for the OnStar® service to become
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Cellular, Entertainment, and Navigation - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
switch has a different resistance value. When a switch is pressed, a voltage drop occurs in the ONSTAR SYMPTOM DIAGNOSIS Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Review Strategy Based Diagnosis for an overview of the diagnostic approach. Diagnostic Procedure Instructions provides an overview of each diagnostic category. Circuit/System Description The vehicle communication interface module (VCIM) is a 3-watt cellular device that allows the Diagnostic Aids The customer concern may have been due to a lack of cellular service in a given area or a
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Cellular, Entertainment, and Navigation - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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