Section 236 (Data Link Communications System)
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 GMC Savana Special, 2003 GMC Savana Camper Special, 2003 GMC Savana, 2003 Chevrolet RV Cutaway, and 2003 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
- Component Locator
- Diagnostic Information and Procedures
- Diagnostic Starting Point - Data Link Communications
- Diagnostic Trouble Code (DTC) List
- DTC U1000 and U1255: Node Alive Message Has Not Been Received From An Unidentified Module
- DTC U1001 To U1254: Module U1XXX Communication
- DTC U1300, U1301, or U1305: Class 2 Serial Data Circuit Voltage
- Symptoms - Data Link Communications
- Scan Tool Does Not Power Up
- Scan Tool Does Not Communicate with Class 2 Device
- Repair Instructions
- Description and Operation