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Chevrolet Silverado / GMC Sierra. Manual - part 2239
Schematic Reference
Radio/Navigation System Schematics
Connector End View Reference
Component Connector End Views
Electrical Information Reference
Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
1. Verify the system works with a known good remote
If the known good remote operates properly, replace the suspect remote.
2. Operate the radio and turn on the rear seat audio (RSA). Verify the remote headphones
operate normally.
If the remote headphones do not operate properly, go to Video Entertainment
System Wireless Headphone Inoperative.
3. Install a scan tool, monitor the button presses in the radio data display. Verify the radio
responds to the remote when the buttons are pressed.
If the radio does not respond, test the remote infra-red signal circuits for an open, short
to ground or short to B+. If the infra-red signal circuits test normal replace audio
system transceiver module.
Repair Procedures
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
IMPORTANT: Test or replace the remote batteries before performing the
circuit/system test.
2008 Chevrolet Silverado 1500
2008 ACCESSORIES & EQUIPMENT Cellular, Entertainment, and Navigation - Cab & Chassis Sierra, Cab & Chassis
Silverado, Sierra & Silverado
Audio System Transceiver Module Replacement
Control Module References for radio replacement, setup, and programming
VIDEO ENTERTAINMENT SYSTEM WIRELESS HEADPHONE INOPERATIVE
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.
Reference Information
Schematic Reference
Radio/Navigation System Schematics
Connector End View Reference
Component Connector End Views
Electrical Information Reference
Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
No Audio From Wireless Headphones
IMPORTANT: Center the balance and fade adjustment on the radio. If
adjustment of the fade and balance eliminates the concern,
review the operation of the radio with the customer.
2008 Chevrolet Silverado 1500
2008 ACCESSORIES & EQUIPMENT Cellular, Entertainment, and Navigation - Cab & Chassis Sierra, Cab & Chassis
Silverado, Sierra & Silverado
1. Turn ON the wireless headphones. Verify the power indicator lamp on the wireless
headphone illuminates.
If the power indicator lamp does not illuminate on the wireless headphones check or
replace the wireless headphone batteries. If the batteries are OK replace the wireless
headphones.
2. Activate the RSA. Set both wireless headphones to the proper channel to hear RSA. Adjust
the volume up on both wireless headphones. Verify that only one set of wireless headphones
operate properly.
If only one set of wireless headphones do not have audio, replace the suspect wireless
headphone set.
3. With a DMM, verify there is B+ at the infra-red module supply voltage circuit when the
RSA is activated.
If B+ is not present, test for a open or short to power on the infra-red module supply
voltage circuit. If the infra-red module supply voltage circuit tests normal, replace the
rear HVAC control module.
4. At the infra-red module connector harness, test for AC voltage between the low reference
circuit and the left and right infra-red audio signal circuits. Verify there is AC voltage with
the RSA activated.
If AC voltage is not present, test for an open, short to ground or short to B+ on the low
reference and both left and right infra-red audio signal circuits. If the low reference
and audio signals test normal replace the rear HVAC control module.
5. Ignition OFF, Disconnect the harness connector of the infra-red module. Test for less than
1.0 ohm between the ground circuit terminal 12 and ground.
If greater than the specified range, repair the ground circuit.
If the ground circuit tests normal, replace the infra-red module.
Audio In One Channel of the Wireless Headphones or Distortion
1. Activate the RSA. Set both wireless headphones to the proper channel to hear RSA. Adjust
the volume up on both wireless headphones. Verify that only one set of wireless headphones
operates properly.
If only one set of wireless headphones is faulty, replace the suspect wireless headphone
set.
IMPORTANT: Center the balance and fade adjustment on the radio. If
adjustment of the fade and balance eliminates the concern,
review the operation of the radio with the customer.
2008 Chevrolet Silverado 1500
2008 ACCESSORIES & EQUIPMENT Cellular, Entertainment, and Navigation - Cab & Chassis Sierra, Cab & Chassis
Silverado, Sierra & Silverado
2. At the infra-red module connector harness, test for AC voltage between the low reference
circuit and the left and right infra-red audio signal circuits. Verify there is AC voltage with
the RSA activated.
If AC voltage is not present, test for an open, short to ground or short to B+ on the low
reference and both left and right infra-red audio signal circuits. If the low reference
and audio signals test normal replace the rear HVAC control module.
3. Test for an open, short to ground or short to B+ on the low reference and both left and right
infra-red audio signal circuits.
If the low reference and audio signals test normal replace the infra-red module.
Repair Procedures
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Audio System Transceiver Module Replacement
REPAIR INSTRUCTIONS
MOBILE TELEPHONE MICROPHONE REPLACEMENT
2008 Chevrolet Silverado 1500
2008 ACCESSORIES & EQUIPMENT Cellular, Entertainment, and Navigation - Cab & Chassis Sierra, Cab & Chassis
Silverado, Sierra & Silverado
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