![]() The 16-pin connector is not a DTC connector, but is rather a modified ALDL connector. The first group of vehicles still contain an ECM, rather than a PCM, and thus still report codes via flashing the MIL/SES light. There are at least groups of 1995 vehicles which have a non-standard 16-pin connector. However, those 1995 vehicles came in different flavors depending on the vehicle and what part of 1995 it was manufactured. The move to OBD-II standardization started in 1994, GM started phasing it in during 1995. When I looked up the code retrieval for GM Domestics, I found a special note relating to 1995 GM vehicles. It talks about some Fords where you can't use the diagnostic port without a scanner, so you climb under the vehicle, pull apart a harness, short two wires for 2 seconds, take the jumper off, short the wires again, and then it will blink the codes. This book gets deep into the grit of obtaining error codes on all sorts of vehicles, including some OBD-II complient vehicles where the manufactuer has left a way for the non-mechanic to get the error codes without a OBD-II tool. The Haynes Computer Codes and Electronic Engine Management Systems Manual ![]() Suprisingly it was rather up-to-date and contained some hard to find information. Ran across the following book in Barnes and Noble today.
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