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Home >> GMC >> 2000 >> Yukon Base, 5.3 T, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 8 (Body Control Modules - Old Style) >> Self-Diagnostic System >> Scan Tool Does Not Communicate With Class 2 Device >> Description

Scan Tool Does Not Communicate With Class 2 Device: Description

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Modules connected to class 2 serial data line monitor serial data communications during normal vehicle operation. Operating information and commands are exchanged between modules. Connecting scan tool to Data Link Connector (DLC) allows communication with modules for diagnostics. DTCs may be set due to this symptom and during testing procedure. Complete testing procedure to ensure that all DTCs are diagnosed and cleared.

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