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3. Inspect that the ground straps between the engine and the frame are clean and tight. 4. If the noise is still present, inspect the charging system for proper operation. 5. Install a filter GM P/N 1224205 in the battery voltage feed circuit to the radio. 6. If the noise is not eliminated, install the filter in each following variation: Install the filter with the single wire side toward the radio and the ground wire Remove the ground to the filter. Reverse the filter so the 2-wire side is toward the radio with the ground wire attached Remove the ground from the filter. 7. If the filter GM P/N 1224205 causes a delay when turning the radio ON or OFF, or other problems, remove the filter and install a 0.47 micro farad capacitor to chassis ground. 8. Before reassembling the vehicle, remove any unneeded filters. 9. Test the functionality all of the vehicle systems for proper operation and function. VIDEO ENTERTAINMENT SYSTEM TROUBLESHOOTING HINTS Schematic Reference: Video System Schematics Many conditions that affect video system operation may be corrected without removing the Be sure the vehicle battery is fully charged before beginning video entertainment system Video or Audio Distortion The manufacturing process for producing DVDs does not have the same quality control processes Video or audio distortion during auxiliary playback can often be attributed to the DC to AC
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Cellular, Entertainment, and Navigation - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
signals into the vehicle electrical system. Video Entertainment System Wireless Headphone Inoperative 1. Volume control on the wireless headphone set is turned all the way down. Adjust the volume control on the headphones. 2. Dead batteries in the wireless headphone set. Turn on power to the headphone set. If the headset indicator does not turn on, replace the batteries in the headset as needed. 3. Faulty headphone set. Test the operation of the system using a known good headphone set. If operation is OK, replace the vehicle headphone set. Video Entertainment System Remote Control Inoperative The buttons on the video remote control do not operate the video disc player but the buttons on 1. Dead batteries in the video remote control. Replace the dead batteries. 2. Faulty remote control. Test the operation of the system using a known good remote control. If operation is OK, replace the remote control. Discs Will Not Eject 1. Attempt to remove the CDs/DVDs from the radio by pushing the "Eject" button on the radio. If there is a "chatter" noise, go to step two. If there is no chatter noise and the discs 2. Remove the radio from the Instrument Panel of the vehicle but do not remove the electrical connectors. Refer to Radio Replacement (without RPO SLT) or Radio Replacement 3. Some versions of these radios have a 9.5 mm x 13 mm oval hole on the top cover of the radio, near the back of the case. If the radio being serviced has this hole, proceed to step IMPORTANT: The following information lists the most probable cause of the concern to the least probable cause followed by the appropriate IMPORTANT: The following information lists the most probable cause of the concern to the least probable cause followed by the appropriate
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Cellular, Entertainment, and Navigation - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Center for repair. 4. Push the "Eject" button. While the discs are attempting to eject, insert a plastic pen cap, or similar plastic object into the hole to assist the top disc out of the radio. 5. After the top disc is removed, push the "Eject" button again to remove the bottom disc. 6. Check the operation of the radio to see if a CD or DVD can be inserted and then ejected. If a CD or DVD can be inserted and ejected from the radio, then reinstall the radio into the DIGITAL RADIO MALFUNCTION 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. Diagnostic Fault Information Circuit/System Description The digital radio receiver (DRR) receives an XM satellite radio signal via the cellular and digital Reference Information Schematic Reference Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance Left Audio Signal (+) 1 1 1 - Left Audio Signal (-) 1 1 1 - Right Audio Signal (+) 2 2 2 - Right Audio Signal (-) 2 2 2 - Digital Radio Antenna Coax 3 3 3 - 1. No or distorted audio from left side speakers when listening to digital radio
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Cellular, Entertainment, and Navigation - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Radio/Navigation System Schematics Connector End View Reference Component Connector End Views Description and Operation Radio/Audio System Description and Operation 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 Special Tools EL-48028 Digital Radio Test Antenna. See Special Tools. Circuit/System Verification 1. Tune to a strong AM or FM station and verify each speaker is producing clear and even sound, with no distortion. If any speaker is not producing sound or the sound produced is distorted, refer to 2. With the vehicle outside in an area with an unobstructed view of the southern sky, tune to XM. Verify XM reception is clear and the No XM Signal message is not displayed on the If the No XM Signal message is displayed or XM reception is poor, refer to Digital 3. Radio tuned to XM, use the radio balance function to transfer audio between the left and right side of the vehicle. Verify clear and even sound is heard from each side of the vehicle. If either side of the vehicle is not producing sound or the sound produced is distorted,
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Cellular, Entertainment, and Navigation - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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