91 Suburban Issues

[jbclassix]

So this is mostly going to be a parts truck for my 1970 build, but While I am working on the 70 body, we are driving this truck. I traded my wheels and tires off my 70 for this rig. It is a 1991 V2500 bare bones 4x4. It had a SES light on when I bought it, and a few other problems that were easy to fix. I have a 43 code that is active right now. I reset it and it came back. I checked the knock sensor and it is new, and ohms are within range, so I moved on to the esc... ok... where is the esc! I have a 95 Yukon and it is mounted on the top side of the bracket that the EGR sol. is mounted to. On the 91 there is not even a connector in that location as indicated by "C"

Other questions... I didn't know they started using the round style 3-pin connectors on TPS see "B" thats a yellow "B" if you cant see it

I also have a mystery relay on the fire wall see "A"



95 Yukon ESC



Also, did all 4x4's have these spacers in the X-member or only HD sprung trucks.