Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2006SUBURBAN C2500, 6.0 UREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 352 (DATA LINK COMMUNICATION SYSTEM)
2006 Chevrolet Suburban C2500, 6.0 U
Section 352 (Data Link Communication System)
2006 Chevrolet Suburban C2500, 6.0 USECTION Section 352 (Data Link Communication System)
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Schematic and Routing Diagrams
- Component Locator
- Diagnostic Information and Procedures
- Diagnostic Starting Point - Data Link Communications
- Diagnostic Trouble Code (DTC) List
- DTC U0073: High Speed CAN Communication Bus
- DTC U0100 To U0299 (Diesel Engine): Lost Communication With U0XXX Module
- DTC U0100 To U0299 (HP2): Lost Communication With U0XXX Module
- DTC U1000: Class 2 Data Link
- DTC U1001 To U1254: Loss of U1XXX Communications
- DTC U1300, U1301, or U1305: Class 2 Data Link Shorted
- DTC U1800, U2105, U2106, or U2108: Lost Communications
- DTC U1881 To U1899: Starter/Generator Control Module Lost Communication With Engine Control Module (ECM)/Powertrain Control Module (PCM)
- DTC U2104: Controller Area Network (CAN) Bus Reset Counter Overrun
- Symptoms - Data Link Communications
- Scan Tool Does Not Power Up
- Scan Tool Does Not Communicate with Class 2 Device
- Scan Tool Does Not Communicate with High Speed GMLAN Device
- Data Link References
- Repair Instructions
- Description and Operation
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.