Diagram obd wiring gm color gmc coded port need 2000 located ll ask question own justanswer Gm 3500 sl: obd2 wiring diagram & color codes Pinout obd2
GM 3500 SL: OBD2 Wiring Diagram & Color Codes | JustAnswer
Obd2 pinout connector wont obdii
Obd2 wont connect while engine is running
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