Diagnostic Aids
WARNING: This page is about a different car, the 2002 Pontiac Firebird and 2002 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.
CIG/ACCY fuse No. 11 (25-amp) in instrument panel fuse block supplies power to DLC terminal No. 16 (Orange wire). When DLC voltage and ground circuits are functioning properly, malfunction must be due to scan tool.
Courtesy of GENERAL MOTORS CORP.