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Home >> GMC >> 1998 >> Envoy >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Body Control Module >> Diagnosis & Testing >> TBC Module Diagnostic System Check >> Notes

TBC Module Diagnostic System Check: Notes

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NOTE: Use of Tech 2 scan tool is recommended. Follow scan tool manufacturer's instructions.
NOTE: Use this check as the starting point for any TBC module complaint. Most malfunctions are caused by faulty wiring, connectors or components.
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