OBD1 engine codes

[Askme42]

So I have a 1991 k1500 that has the old OBD1 plug. I'm trying to figure out which two points to jump to read the codes just using the flashing check engine light. If anyone knows thank u so much in advance.

 

[shelbyt.67]

The two plugs next to each other in the upper right corner

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[Swaggerwagon]

jump the two top/right side terminals....

http://www.extreme-check-engine-light-codes.com/GM OBD1 Decoder.htm

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[Askme42]

Sweet your my boy blue.