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Diagnostic Connector Location Chevrolet Chevy Van G20

CAUTIONDO NOT connect or disconnect Air Bag System Diagnostic Module (ASDM) electrical connector unless module mounting tabs are securely bolted (grounded) to vehicle. ALWAYS disconnect and isolate battery negative cable before servicing system.
ApplicationTest Connector Location
VanDiagnostic (ALDL) connector under left side of dash.

TEST CONNECTOR LOCATION