October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.
Cellular System, Entertainment System, And Navigation System Expand All (for easy ctrl-f) Collapse All Specifications Schematic and Routing Diagrams Diagnostic Information and Procedures Diagnostic Code Index Diagnostic Starting Point - Cellular, Entertainment, and Navigation DTC B0000 DTC B1024 DTC B1025-B1095 Diagnostic Instructions DTC Descriptors Diagnostic Fault Information Circuit/System Description Conditions for Running the DTC Conditions for Setting the DTC Set by Radio Set by Bose Amplifier DTC B1025 01, B1035 01, B1045 01, B1055 01, B1065 01, B1075 01, B1085 01, B1095 01 DTC B1025 02, B1035 02, B1045 02, B1055 02, B1065 02, B1075 02, B1085 02, B1095 02 DTC B1025 04, B1035 04, B1045 04, B1055 04, B1065 04, B1075 04, B1085 04, B1095 04 Action Taken When the DTC Sets Conditions for Clearing the DTC Diagnostic Aids Reference Information Circuit/System Verification Circuit/System Testing Repair Procedures DTC B1259 DTC B1287 DTC B1288 DTC B1289 DTC B2455 DTC B2462 DTC B2470 DTC B2474 DTC B2476 or B2482 DTC B2483 or B2484 Symptoms - Cellular Communication Symptoms - Entertainment Symptoms - Navigation Systems Video Entertainment System Troubleshooting Hints Audio/Video Disc Player Adapter - Audio or Video Inoperative or Degraded Quality Digital Radio Malfunction Dual DVD Rear Seat Entertainment Headrest Display Inoperative - One or More Dual DVD Rear Seat Entertainment Headrest Audio Distorted or Inoperative Dual DVD Rear Seat Entertainment Headrest Video Does Not Synchronize Dual DVD Rear Seat Entertainment Headrest Wireless Headphones Inoperative Dual DVD Rear Seat Entertainment Headrest Remote Inoperative OnStar Global Positioning System (GPS) Data Not Current or Inaccurate OnStar Microphone Inoperative - Caller Cannot Be Heard Navigation System - Voice Recognition Inoperative No (or Noisy) OnStar Audio No Global Positioning System (GPS) Reception Noise Compensated Volume Inoperative OnStar Button LED Inoperative OnStar Call Center Remote Function Requests Inoperative OnStar One or More Buttons Inoperative OnStar Reconfiguration (with TIS 2 Web Gen 4 and later) OnStar Steering Wheel Control Functions Inoperative OnStar Symptom Diagnosis Radio Audio Inoperative at Rear Seat Audio (RSA) Control Radio Controls Inoperative - Rear Seat Radio Displays CAL or CAL ERR Radio Displays LOC, LOCKED, or CODE Radio Poor Reception Speaker Replacement Reference Speaker Malfunction Unable to Contact OnStar Call Center Video Display is Poor or Blank (Rear Seat Entertainment RPO U42) Video Entertainment System Inoperative (Rear Seat Entertainment RPO U42) Video Entertainment System Remote Control Inoperative (Rear Seat Entertainment RPO U42) Video Entertainment System Wireless Headphone Inoperative (Rear Seat Entertainment RPO U42) OnStar Voice Recognition Inoperative Repair Instructions Description and Operation Special Tools and Equipment