[scorp508]

Code reading and clearing can be done via paperclip or the cluster itself.

Besides those methods....

Similar to a Tech-1, I use a Vetronix MasterTech w/GM cartridges I picked up on eBay to read/clear codes, spot check other OBD1 information, or perform other simple tests it can do.

One of these, but you need to have the GM cards.

https://www.ebay.com/itm/335578210632


When I want more data over a period of time or to see certain attributes together at once, then I use TunerPro RT with a USB cable from Red Devil River to my OBD port to datalog. 90-93 use the 12-pin OBD1 style port while 94/95 use the 16-pin OBD2 style port even though the vehicle still runs OBD1. They offer an adapter between the two styles.

https://www.ebay.com/itm/363678152938

TunerPro RT: https://tunerpro.net/downloadApp.htm